Sequence-based physical uplink control channel transmission - Patents.com

Abstract

Methods, systems, and devices for wireless communication are described. User equipment (UE) can identify if an uplink control information (UCI) payload meets a threshold size requirement. The UE can map the UCI payload to an uplink control sequence. The UE can transmit a physical uplink control channel (PUCCH) containing the uplink control sequence to a base station. The uplink control sequence may represent the UCI payload. The base station can receive a PUCCH containing the uplink control sequence from the UE. The base station can also determine the UCI payload by associating the uplink control sequence with a corresponding sequence index of one or more sets of uplink control sequences.

Description

[Technical field]

[0001] cross reference This patent application claims the benefit of U.S. Provisional Patent Application No. 62 / 905,131, filed September 24, 2019, by Kowshik et al., entitled "SEQUENCE BASED PHYSICAL UPLINK CONTROL CHANNEL TRANSMISSION," as well as U.S. Provisional Patent Application No. 62 / 937,650, filed November 19, 2019, by Yang et al., entitled "SEQUENCE BASED PHYSICAL UPLINK CONTROL CHANNEL TRANSMISSION," and U.S. Provisional Patent Application No. 17 / 028,806, filed September 22, 2020, by Yang et al., entitled "SEQUENCE BASED PHYSICAL UPLINK CONTROL CHANNEL TRANSMISSION," each of which is assigned to the assignee of the present application.

[0002] The following relates generally to wireless communications, and more particularly, to sequence-based Physical Uplink Control Channel (PUCCH) transmissions. [Background technology]

[0003] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcasts, and the like. These systems may be capable of supporting 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), LTE Advanced (LTE-A), or LTE-A Pro systems, and fifth generation (5G) systems, sometimes referred to as New Radio (NR) systems. These systems may employ 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 Spread 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 simultaneously supporting communication for multiple communication devices, which may in some cases be known as user equipment (UE).

[0004] The UE may communicate with a base station serving a cell. The communication may include the UE transmitting uplink control information (UCI) to the base station. The UCI may be channel coded for error protection and error correction. In some cases, the channel coding may be inefficient and result in inaccurate decoding for certain channel property qualities. Summary of the Invention [Means for solving the problem]

[0005] The described techniques relate to improved methods, systems, devices, and apparatuses that support sequence-based physical uplink control channel (PUCCH) transmission. In general, the described techniques provide a user equipment (UE) that generates and transmits an uplink control sequence corresponding to uplink control information (UCI) as part of a sequence-based UCI transmission. The UE may identify that the UCI payload satisfies a condition, such as a threshold size condition. The UE may map the UCI payload to the uplink control sequence. The UE may transmit a PUCCH including the uplink control sequence to a base station. The uplink control sequence may represent the UCI payload. The base station may receive a PUCCH including the uplink control sequence from the UE. The base station may also determine the UCI payload by associating the uplink control sequence with a corresponding sequence index of one or more sets of uplink control sequences.

[0006] A method of wireless communication in a UE is described, which may include identifying a UCI payload as meeting a threshold size condition, mapping the UCI payload to an uplink control sequence based on the UCI payload meeting the threshold size condition, and transmitting a PUCCH including the uplink control sequence, where the uplink control sequence represents the UCI payload.

[0007] An apparatus for wireless communication in a UE is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions, when executed by the processor, may be operable to cause the apparatus to: identify a UCI payload as meeting a threshold size condition, map the UCI payload to an uplink control sequence based on the UCI payload meeting the threshold size condition, and transmit a PUCCH including the uplink control sequence, where the uplink control sequence represents the UCI payload.

[0008] Another apparatus is described for wireless communication in a UE, the apparatus may include means for identifying a UCI payload as meeting a threshold size condition, means for mapping the UCI payload to an uplink control sequence based on the UCI payload meeting the threshold size condition, and means for transmitting a PUCCH including the uplink control sequence, where the uplink control sequence represents the UCI payload.

[0009] A non-transitory computer-readable medium storing code for wireless communication in a UE is described, the code may include instructions executable by a processor to identify a UCI payload as meeting a threshold size condition, map the UCI payload to an uplink control sequence based on the UCI payload meeting the threshold size condition, and transmit a PUCCH including the uplink control sequence, where the uplink control sequence represents the UCI payload.

[0010] Transmitting the PUCCH may include acts, features, means, or instructions for transmitting the uplink control sequence as a non-coherent transmission without a demodulation reference signal.

[0011] Mapping the UCI payload to an uplink control sequence may include operations, features, means, or instructions for converting the UCI payload to a decimal value and selecting an uplink control sequence from a set of uplink control sequences based on the decimal value.

[0012] The quantity (or number) of uplink control sequences in the set of uplink control sequences is 2 k may be greater than or equal to, where k may be the payload size.

[0013] Selecting an uplink control sequence from a set of uplink control sequences may include acts, features, means, or instructions for selecting an uplink control sequence, which may be associated with a decimal value.

[0014] The uplink control sequence may be multiplied with the signature sequence, and transmitting the uplink control sequence comprises transmitting the uplink control sequence multiplexed with the signature sequence.

[0015] The multiplexing index may be received from a base station, and the signature sequence may be generated based at least in part on the multiplexing index.

[0016] The signature sequence may be associated with one transmit antenna of a set of transmit antennas for the UE.

[0017] A signature sequence associated with one transmit antenna in the set of transmit antennas may be orthogonal to other signature sequences associated with other transmit antennas in the set of transmit antennas of the UE.

[0018] The uplink control sequence and the signature sequence may be the same length.

[0019] An indication may be received that the UE may use some or all of the transmit antennas in the set of transmit antennas when transmitting the PUCCH.

[0020] The indication may be associated with the format of the PUCCH.

[0021] The signature sequence may be associated with a UE or with a PUCCH resource that the UE uses to transmit the PUCCH.

[0022] The multiplexing index may be received from the base station, and the multiplexing index may be different from other multiplexing indexes provided to other UEs that are also scheduled to transmit using resources assigned to the UE for the PUCCH. The multiplexing index may be used to map the UCI payload to an uplink control sequence.

[0023] The multiplexing index may be associated with a PUCCH resource.

[0024] Using a multiplexing index to map the UCI payload to an uplink control sequence may include operations, features, means, or instructions for selecting a set of uplink control sequences from one of the sets of uplink control sequences based on the multiplexing index and selecting an uplink control sequence from the set of uplink control sequences.

[0025] Using a multiplexing index to map a UCI payload to an uplink control sequence may include operations, features, means, or instructions for selecting an uplink control sequence from a set of uplink control sequences based on the UCI payload and the multiplexing index.

[0026] Selecting an uplink control sequence from the set of uplink control sequences may include operations, features, means, or instructions for converting the multiplexing index into a binary string, concatenating the binary string with the UCI payload to form a concatenated string, converting the concatenated string into a decimal value, and selecting an uplink control sequence from the set of uplink control sequences based on the decimal value representing the concatenated string.

[0027] Selecting an uplink control sequence from the set of uplink control sequences may include operations, features, means, or instructions for converting the UCI payload to a decimal value, summing a first multiple of the decimal value representing the UCI payload with a second multiple of the multiplexing index to form a summed decimal value, and selecting an uplink control sequence from the set of uplink control sequences based on the summed decimal value.

[0028] The first multiple may be based on the amount of UEs scheduled to transmit using resources assigned to the UE for PUCCH, where the amount of UEs includes the UE and other UEs, and the second multiple may be one.

[0029] The first multiple may be 1 and the second multiple may be based on the amount of bits of the UCI payload.

[0030] Mapping the UCI payload to an uplink control sequence may include operations, features, means, or instructions for selecting an uplink control sequence from one or more sets of uplink control sequences, where the sequences in the one or more sets of uplink control sequences may be Zadoff-Chu (ZC) sequences, binary or quadrature phase shift keying modulation Gold or M sequences, or discrete Fourier transform based sequences.

[0031] The one or more sets of uplink control sequences include Discrete Fourier Transform-based sequences, which may be based on deterministic sampling of row entries in selected columns of a Discrete Fourier Transform matrix according to a sampling function.

[0032] The one or more sets of uplink control sequences include inverse discrete Fourier transform-based sequences, which may be based on deterministic sampling of row entries in selected columns of an inverse discrete Fourier transform matrix according to a sampling function.

[0033] Selecting the uplink control sequence may further include operations, features, means, or instructions for generating a seed for a binary phase or quadrature phase shift keying modulation Gold or M sequence based on the UCI payload, and selecting the binary phase or quadrature phase shift keying modulation Gold or M sequence based on the generated seed.

[0034] The UCI payload may be mapped to a seed, and a binary or quadrature phase shift keying modulation Gold or M sequence may be selected based on the mapping.

[0035] The seed may be generated based on the UCI payload and a UE identifier, a cell identifier, or a multiplexing index, or a combination thereof.

[0036] The multiplexing index may be received from a base station, and the multiplexing index may be different from other multiplexing indexes provided to other UEs that are also scheduled to transmit using resources assigned to the UE for the physical uplink control channel. The multiplexing index may be used to map the UCI payload to generate a seed.

[0037] Using the multiplexed index to map the UCI payload to generate a seed may further include operations, features, means, or instructions for converting the multiplexed index to a binary string, concatenating the binary string with the UCI payload to form a concatenated string, converting the concatenated string to a decimal value, and generating the seed based on the decimal value representing the concatenated string.

[0038] Using the multiplexed index to map the UCI payload to generate the seed may further include operations, features, means, or instructions for converting the UCI payload to a decimal value, summing a first multiple of the decimal value representing the UCI payload with a second multiple of the multiplexed index to form a summed decimal value, and generating the seed based on the summed decimal value.

[0039] A transform precoding operation may be applied to the uplink control sequence, which may be mapped to frequency domain resources after application of the transform precoding operation and prior to transmission of the PUCCH.

[0040] The uplink control sequence may be mapped to frequency domain resources prior to transmission of the PUCCH, and the uplink control sequence is non-transform precoded. In addition, identifying that the UCI payload satisfies a threshold size condition may further include an operation, feature, means, or instruction for identifying the UCI payload as less than or equal to a predetermined maximum payload size.

[0041] A method of wireless communication in a base station is described, which may include identifying a UCI payload to be transmitted by a UE as an uplink control sequence when the UCI payload meets a threshold size condition, identifying one or more sets of uplink control sequences from which the uplink control sequence is to be selected by the UE, receiving a PUCCH including the uplink control sequence, where the uplink control sequence represents the UCI payload, and determining the UCI payload by associating the uplink control sequence with a corresponding sequence index of the one or more sets of uplink control sequences.

[0042] An apparatus for wireless communication in 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, when executed by the processor, may be operable to cause the apparatus to: identify a UCI payload to be transmitted by a UE as an uplink control sequence when the UCI payload meets a threshold size condition; identify one or more sets of uplink control sequences from which the uplink control sequence is to be selected by the UE; receive a PUCCH including the uplink control sequence, where the uplink control sequence represents a UCI payload; and determine the UCI payload by associating the uplink control sequence with a corresponding sequence index of the one or more sets of uplink control sequences.

[0043] Another apparatus for wireless communication in a base station is described. The apparatus may include means for identifying a UCI payload to be transmitted by a UE as an uplink control sequence when the UCI payload satisfies a threshold size condition, means for identifying one or more sets of uplink control sequences from which the uplink control sequence is to be selected by the UE, means for receiving a PUCCH including the uplink control sequence, where the uplink control sequence represents the UCI payload, and means for determining the UCI payload by associating the uplink control sequence with a corresponding sequence index of the one or more sets of uplink control sequences.

[0044] A non-transitory computer-readable medium storing code for wireless communications in a base station is described, the code may include instructions executable by a processor to: identify a UCI payload to be transmitted by a UE as an uplink control sequence when the UCI payload meets a threshold size condition, identify one or more sets of uplink control sequences from which the uplink control sequence is to be selected by the UE, receive a PUCCH including the uplink control sequence, where the uplink control sequence represents the UCI payload, and determine the UCI payload by associating the uplink control sequence with a corresponding sequence index of the one or more sets of uplink control sequences.

[0045] Receiving the PUCCH may include acts, features, means, or instructions for receiving the uplink control sequence as a non-coherent transmission without a demodulation reference signal.

[0046] The sequence index may be a decimal value in the UCI payload.

[0047] Determining the UCI payload may include acts, features, means, or instructions for identifying that the uplink control sequence may have been multiplied with the signature sequence prior to transmission of the uplink control sequence.

[0048] The signature sequence may be associated with one transmit antenna of a set of transmit antennas for the UE.

[0049] A signature sequence associated with one transmit antenna in the set of transmit antennas may be orthogonal to other signature sequences associated with other transmit antennas in the set of transmit antennas of the UE.

[0050] The signature sequence and the uplink control sequence prior to multiplication with the signature sequence may be of the same length.

[0051] An indication may be sent that the UE may use some or all of the transmit antennas in the set of transmit antennas when transmitting the PUCCH.

[0052] The indication may be associated with the format of the PUCCH.

[0053] The multiplexing index may be transmitted to the UE, and the multiplexing index may be different from other multiplexing indexes provided to other UEs that are also scheduled to transmit using resources assigned to the UE for PUCCH.

[0054] The multiplexing index may be associated with a PUCCH resource.

[0055] The set or sets of uplink control sequences from which the uplink control sequence may be selected may be a set of uplink control sequences in one set of the sets of uplink control sequences, where the set of uplink control sequences corresponds to a multiplexing index.

[0056] The set or sets of uplink control resources from which the uplink control sequence may be selected may be common to the UE and other UEs.

[0057] The set or sets of uplink control resources from which the uplink control sequence may be selected include a sequence that may be a ZC sequence, a binary or quadrature phase shift keying modulation Gold or M sequence, a discrete Fourier transform based sequence, or an inverse discrete Fourier transform based sequence. [Brief description of the drawings]

[0058] [Figure 1]FIG. 1 illustrates an example of a system for wireless communication supporting sequence-based Physical Uplink Control Channel (PUCCH) transmissions, according to an aspect of the present disclosure. [Diagram 2] FIG. 1 illustrates an example of a wireless communication system supporting sequence-based PUCCH transmission, according to an aspect of the present disclosure. [Figure 3A] FIG. 1 illustrates an example of a process diagram for supporting sequence-based PUCCH transmission, according to an aspect of the disclosure. [Figure 3B] FIG. 1 illustrates an example of a process diagram for supporting sequence-based PUCCH transmission, according to an aspect of the disclosure. [Figure 4] FIG. 1 illustrates an example of a process flow for supporting sequence-based PUCCH transmission, according to an embodiment of the present disclosure. [Diagram 5] 1 is a block diagram of a device supporting sequence-based PUCCH transmission according to an aspect of the disclosure. [Figure 6] 1 is a block diagram of a device supporting sequence-based PUCCH transmission according to an aspect of the disclosure. [Figure 7] 1 is a block diagram of a communications manager supporting sequence-based PUCCH transmission according to an aspect of the disclosure. [Figure 8] FIG. 1 is a diagram of a system including a device that supports sequence-based PUCCH transmission, according to an aspect of the disclosure. [Figure 9] 1 is a block diagram of a device supporting sequence-based PUCCH transmission according to an aspect of the disclosure. [Figure 10] 1 is a block diagram of a device supporting sequence-based PUCCH transmission according to an aspect of the disclosure. [Figure 11] 1 is a block diagram of a communications manager supporting sequence-based PUCCH transmission according to an aspect of the disclosure. [Figure 12] FIG. 1 is a diagram of a system including a device that supports sequence-based PUCCH transmission, according to an aspect of the disclosure. [Figure 13] 1 is a flowchart illustrating a method for supporting sequence-based PUCCH transmission according to an aspect of the present disclosure. [Figure 14] 1 is a flowchart illustrating a method for supporting sequence-based PUCCH transmission according to an aspect of the present disclosure. [Figure 15] 1 is a flowchart illustrating a method for supporting sequence-based PUCCH transmission according to an aspect of the present disclosure. [Figure 16] 1 is a flowchart illustrating a method for supporting sequence-based PUCCH transmission according to an aspect of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0059] A user equipment (UE) may transmit uplink control information (UCI) to a base station. The UCI may include information from the UE, such as a scheduling request (SR), hybrid automatic repeat request (HARQ) positive / negative acknowledgement (ACK / NACK) feedback, and channel quality indicator (CQI) information. One or more UEs may transmit UCI to the base station using the same or partially overlapping resources. Thus, each UCI transmitted by each UE may be coded differently to provide error protection and error correction when the amount (e.g., number) of UCI bits exceeds two bits (e.g., in a short physical uplink control channel (PUCCH) format). The type of coding may depend on the UCI payload size (e.g., size of the payload in bits).

[0060] In some cases, the UCI may be channel coded. For example, if the UCI payload size K is less than or equal to 11 bits, a Reed-Muller channel code may be used. If the payload size is 12≦K≦19, a cyclic redundancy check (CRC)-aided parity check polar channel code may be used. If the payload size K is greater than 19, a CRC-aided polar channel code may be used. For channel coding, the UCI may be transmitted by the UE in a physical uplink control channel (PUCCH), and the UE may also include a demodulation reference signal (DMRS) transmission. The DMRS may be used in channel estimation to determine channel coefficients. The UCI may be coherently decoded using the estimated channel.

[0061] At low signal-to-noise ratios (SNRs), the quality of channel estimation may limit the performance of PUCCH reception and therefore the coverage of a cell. To improve coverage, sequence-based transmission may be used instead of a channel coding-based scheme. Sequence-based transmission may not use coding or modulation and may not include DMRS generation or transmission. Sequence-based transmission without DMRS generation or transmission may be an example of non-coherent transmission. Sequence-based transmission may also enhance decoding and detection performance at a receiver (e.g., a base station).

[0062] A UE that performs sequence-based transmission may generate a sequence based on the UCI payload and transmit the sequence to the base station. 0 , a 1 , ..., a k-1The sequence-based generation may be in the format of K≦11. The sequence-based generation may be used when the payload size K meets a threshold. For example, the sequence-based coding may be used when K≦11 or when the threshold may be K≦19. The sequence-based coding process may utilize non-coherent transmission since there may be no DMRS transmitted with UCI in the PUCCH. Thus, channel estimation may not be required by the receiver. Thus, the performance of the sequence-based non-coherent transmission may not rely on the quality of the channel estimation.

[0063] The sequence-based transmission may generally include a UE performing sequence generation, mapping the sequence to resource elements (REs), and transmitting the sequence in a PUCCH. More specifically, the sequence generation may include determining that the UCI payload meets a threshold size, converting the UCI to a decimal equivalent, using a multiplexing index to select a sequence from a sequence pool, and generating a full sequence based on the selected sequence and the decimal equivalent of the UCI. In some cases, the UE may apply transform precoding before mapping the sequence to the REs.

[0064] Sequence-based transmission may be used in both single and multiple UE scenarios. In a single UE scenario, if the UE is equipped with multiple antennas, the UE may transmit sequences using multiple antennas. The UE may achieve this using antenna-specific masking. In a multiple UE scenario, multiple UEs may transmit sequences on the same set of resources. In some cases with multiple UEs, each UE may have a separate sequence pool from which to generate sequences. In other cases with multiple UEs, two or more UEs may generate sequences based on a joint sequence pool.

[0065] Aspects of the present disclosure are first described in the context of a wireless communication system. Aspects of the present disclosure are then described in the context of process diagrams and process flows. Aspects of the present disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flow charts relating to sequence-based PUCCH transmission.

[0066] 1 illustrates an example of a wireless communication system 100 supporting sequence-based PUCCH transmission according to aspects of the disclosure. 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, a LTE-Advanced (LTE-A) network, a 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.

[0067] The base stations 105 may be distributed throughout a geographic area and may be devices of different configurations or with different capabilities to form a wireless communication system 100. 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 via one or more radio access technologies.

[0068] The UEs 115 may be distributed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be fixed or mobile or both at different times. The UEs 115 may be devices of different forms or with different capabilities. Some example UEs 115 are shown 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) as shown in FIG.

[0069] The base stations 105 may communicate with the core network 130, with each other, or both. For example, the base stations 105 may interface with the core network 130 through one or more backhaul links 120 (e.g., via an S1, N2, N3, or other interface). The base stations 105 may communicate with each other via the backhaul links 120 (e.g., via an X2, Xn, or other interface), either directly (e.g., directly between the base stations 105) or indirectly (e.g., via the core network 130), or both. In some examples, the backhaul links 120 may be or include one or more wireless links.

[0070] One or more of the base stations 105 described herein may include or be referred to as a base transceiver station, radio base station, access point, radio transceiver, Node B, eNode B (eNB), Next Generation Node B or Giga Node B (any of which may be referred to as a gNB), Home Node B, Home eNode B, or other suitable terminology by those skilled in the art.

[0071] The UE 115 may include or be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where a "device" may also be referred to as a unit, a station, a terminal, or a client, among other examples. The UE 115 may also include or 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, the 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, among other examples, which may be implemented in various articles, such as an appliance, or a vehicle, a meter, among other examples.

[0072] The UEs 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, which may at times act as relays, as shown in FIG. 1, as well as base stations 105 and network equipment, including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples.

[0073] The UE 115 and the base station 105 may wirelessly communicate 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 to support the communication link 125. For example, a carrier used for the communication link 125 may include a portion (e.g., a bandwidth part (BWP)) of a radio frequency spectrum band 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 collection signaling (e.g., synchronization signals, system information), control signaling that coordinates operation on the carrier, 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 with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used with both frequency division duplex (FDD) and time division duplex (TDD) component carriers.

[0074] In some examples (e.g., in a carrier aggregation configuration), a carrier may also have collection signaling or control signaling to coordinate operation with respect to 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 arranged according to a channel raster for discovery by the UE 115. A carrier may operate in a standalone mode where initial collection and connection may be performed by the UE 115 over the carrier, or the carrier may operate in a non-standalone mode where a connection is anchored using a different carrier (e.g., of the same or different radio access technology).

[0075] The communication links 125 shown in the wireless communication system 100 may include uplink transmissions from the UE 115 to the base station 105 or downlink transmissions from the base station 105 to the UE 115. A carrier may carry downlink or uplink communications (e.g., in FDD mode) or may be configured to carry downlink and uplink communications (e.g., in TDD mode).

[0076] A carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as the carrier or the “system bandwidth” of the wireless communication system 100. For example, the carrier bandwidth may be one of several determined bandwidths for a carrier of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)). The devices of the wireless communication system 100 (e.g., the base station 105, the UE 115, or both) may have a hardware configuration that supports communication on a particular carrier bandwidth or may be configurable to support communication on one of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 or a UE 115 that supports simultaneous communication via a carrier associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured to operate over a portion (e.g., a sub-band, BWP) or all of the carrier bandwidth.

[0077] A signal waveform transmitted on a carrier may be composed of multiple subcarriers (e.g., using a multi-carrier modulation (MCM) technique, such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system employing MCM techniques, a resource element may consist of one symbol period (e.g., the duration of one modulation symbol) and one subcarrier, where the symbol 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 coding rate of the modulation scheme, or both). Thus, the more resource elements and the higher the order of the modulation scheme that the UE 115 receives, the higher the data rate of the UE 115 may 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 may further increase the data rate or data integrity for communication with the UE 115.

[0078] One or more numerologies for a carrier may be supported, where the numerology may include a subcarrier spacing (Δf) and a cyclic prefix. A carrier may be divided into one or more BWPs having the same or different numerologies. 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 communication for the UE 115 may be limited to one or more active BWPs.

[0079] The time interval for the base station 105 or the UE 115 may be, for example, T s =1 / (Δf max N f ) seconds, or expressed in multiples of the base time unit, where Δf max may represent the maximum supported subcarrier spacing, and N fmay represent the maximum supported discrete Fourier transform (DFT) size. The communication resource time intervals 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).

[0080] Each frame may include multiple consecutively numbered subframes or slots, and each subframe or slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into several slots. Alternatively, each frame may include a variable number of slots, and the number of slots may depend on the subcarrier spacing. Each slot may include several symbol periods (e.g., depending on the length of a cyclic prefix prepended to each symbol period). In some wireless communications systems 100, a slot may be further divided into multiple minislots containing one or more symbols. Excluding the cyclic prefix, each symbol period may include one or more (e.g., N f The duration of a symbol period may depend on the subcarrier spacing or the frequency band of operation.

[0081] A subframe, slot, minislot, or symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications 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 communications system 100 may be dynamically selected (e.g., in a burst of shortened TTIs (sTTIs)).

[0082] The physical channels may be multiplexed on the carriers according to various techniques. The physical control channels and the physical data channels may be multiplexed on the downlink carriers using, for example, one or more of a time division multiplexing (TDM), a frequency division multiplexing (FDM), or a hybrid TDM-FDM technique. A control region (e.g., a control resource set (CORESET)) for the physical control channel may be defined by a symbol period and may span the system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESET) may be configured for a set of UEs 115. For example, one or more of the UEs 115 may monitor or search the 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 at one or more aggregation levels arranged in a cascaded manner. The aggregation level for the control channel candidates may refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with the 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 sending control information to multiple UEs 115 and a UE-specific search space set for sending control information to a particular UE 115.

[0083] Each base station 105 may provide communication coverage via one or more cells, e.g., macro cells, small cells, hot spots, or other types of cells, or any combination thereof. The term "cell" may refer to a logical communication entity used to communicate with the base station 105 (e.g., over a carrier) and may be associated with an identifier (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID), or other) to distinguish neighboring cells. In some examples, a cell may also refer to a geographic coverage area 110 or a portion (e.g., a sector) of the geographic coverage area 110 in which the logical communication entity operates. Such a cell may range from a smaller area (e.g., a structure, a subset of a structure) to a larger area, depending on various factors such as the capabilities of the base station 105. For example, a cell may be or include a building, a subset of a building, or an outside space between or overlapping with the geographic coverage area 110, among other examples.

[0084] A macro cell generally covers a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access by UEs 115 subscribing to the service of a network provider supporting the macro cell. A small cell may be associated with a lower power base station 105 compared to a macro cell, and the small cell may operate in the same or different (e.g., licensed, unlicensed) frequency band as the macro cell. A small cell may provide unrestricted access to UEs 115 subscribing to the service of a network provider, or may provide restricted access to UEs 115 that have an association with the small cell (e.g., UEs 115 in a closed subscriber group (CSG), UEs 115 associated with a user in a home or office). A base station 105 may support one or more cells and may also support communication via one or more cells using one or more component carriers.

[0085] In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, Narrowband IoT (NB-IoT), enhanced Mobile Broadband (eMBB)) that may provide access to different types of devices.

[0086] In some examples, the base stations 105 may be mobile and thus provide communication coverage to moving 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 heterogeneous networks, for example, where different types of base stations 105 provide coverage to various geographic coverage areas 110 using the same or different radio access technologies.

[0087] The wireless communications system 100 may support synchronous or asynchronous operation. For synchronous operation, the base stations 105 may have similar frame timing and transmissions from different base stations 105 may be approximately aligned in time. For asynchronous operation, the base stations 105 may have different frame timing and transmissions from different base stations 105 may not be aligned in time, in some examples. The techniques described herein may be used for either synchronous or asynchronous operation.

[0088] Some UEs 115, such as MTC or IoT devices, may be low-cost or low-complexity devices and provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC may refer to data communication technologies that allow devices to communicate with each other or with the base station 105 without human intervention. In some examples, M2M communication or MTC may include communication from devices that incorporate sensors or meters to measure or capture information and relay such information to a central server or application program that utilizes the information or presents the information to a human who interacts with the application program. Some UEs 115 may be designed to collect information or enable automated behavior of machines or other devices. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business billing.

[0089] Some UEs 115 may be configured to employ operating modes that reduce power consumption, such as half-duplex communication (e.g., a mode that supports one-way communication via transmission or reception, but not simultaneous transmission and reception). In some examples, the half-duplex communication may be performed at a reduced peak rate. Other power conservation techniques for the UE 115 include entering a power-saving deep sleep mode when not engaged in active communication, operating over a limited bandwidth (e.g., in accordance with narrowband communication), or a combination of these techniques. For example, some UEs 115 may be configured for operation using a narrowband protocol type associated with a defined portion or range (e.g., a set of subcarriers or resource blocks (RBs)) within a carrier, within a guard band of the carrier, or outside of the carrier.

[0090] The wireless communication system 100 may be configured to support ultra-reliable or low latency communications, or various combinations thereof. For example, the wireless communication system 100 may be configured to support ultra-reliable low latency communications (URLLC) or mission-critical communications. The UE 115 may be designed to support ultra-reliable, low latency, or critical functions (e.g., mission-critical functionality). Ultra-reliable communications may include private or group communications 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 functionality may include service prioritization, and the mission-critical services may be used for public safety or general commercial applications. The terms ultra-reliable, low latency, mission-critical, and ultra-reliable low latency may be used interchangeably herein.

[0091] In some examples, the UE 115 may also be able to communicate directly with other UEs 115 via device-to-device (D2D) communication links 135 (e.g., using peer-to-peer (P2P) or D2D protocols). One or more UEs 115 utilizing D2D communication may be within the geographic coverage area 110 of the 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 in some examples. In some examples, a group of UEs 115 communicating via D2D communication may utilize a one-to-many (1:M) system in which each UE 115 transmits to every other UE 115 in the group. In some examples, the base station 105 facilitates scheduling of resources for D2D communication. In other cases, D2D communication occurs between UEs 115 without the involvement of the base station 105.

[0092] In some systems, the D2D communication link 135 may be an example of a communication channel between vehicles (e.g., UE 115), such as a sidelink communication channel. In some examples, the vehicles may communicate using vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination thereof. The vehicles may signal information about traffic conditions, signal scheduling, weather, safety, emergency situations, or any other information related to the V2X system. In some examples, the vehicles in the V2X system may communicate with roadside infrastructure, such as roadside units, and / or with a network via one or more network nodes (e.g., base stations 105) using vehicle-to-network (V2N) communication.

[0093] 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 5G core (5GC), which may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) that manages 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)) that routes packets or interconnects to external networks. The control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management for the UEs 115 served by the base stations 105 associated with the core network 130. User IP packets may be forwarded through the user plane entity, which may provide IP address allocation as well as other functions. The user plane entities may be connected to network operator IP services 150. Operator IP services 150 may include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0094] Some of the network devices, such as the base station 105, may include subcomponents, such as an access network entity 140, which may be an example of an access node controller (ANC). Each access network entity 140 may communicate with the UE 115 through one or more other access network transmission entities 145, which may be referred to as a radio head, a smart radio head, or a transmit / receive point (TRP). Each access network transmission entity 145 may include one or more antenna panels. In some configurations, 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 may be integrated within a single network device (e.g., the base station 105).

[0095] The wireless communication system 100 may operate using one or more frequency bands, typically within the range of 300 megahertz (MHz) to 300 gigahertz (GHz). The 300 MHz to 3 GHz region is commonly known as the ultra-high frequency (UHF) region or decimeter band, as the wavelengths range from approximately 1 decimeter to 1 meter in length. Although UHF waves may be blocked or redirected by buildings and environmental characteristics, these waves may penetrate structures sufficiently for a macrocell to serve UEs 115 located indoors. Transmission of UHF waves may be associated with smaller antennas and shorter distances (e.g., less than 100 kilometers) compared to transmissions using lower frequencies and longer waves in the short wave (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0096] The wireless communication system 100 may also operate in the super high frequency (SHF) region, using a frequency band from 3 GHz to 30 GHz, also known as the centimeter band, or in the extremely high frequency (EHF) region of the spectrum, also known as the millimeter band (e.g., from 30 GHz to 300 GHz). In some examples, the wireless communication system 100 may support millimeter wave (mmW) communications between the UE 115 and the base station 105, where the EHF antennas of the respective devices may be smaller and more closely spaced than UHF antennas. In some examples, this may facilitate the use of antenna arrays in the devices. However, propagation of EHF transmissions may experience more atmospheric attenuation and shorter distances than SHF or UHF transmissions. The techniques disclosed herein may be employed across transmissions using one or more different frequency regions, and the designated use of the bands across these frequency regions may vary by country or regulatory body.

[0097] The wireless communication system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 may employ License 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 the base station 105 and the UE 115 may employ carrier sensing for collision detection and avoidance. In some examples, operation in an unlicensed band may be based on a carrier aggregation configuration in conjunction with a component carrier operating in a licensed band (e.g., LAA). Operation in an unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.

[0098] The base station 105 or UE 115 may be equipped with multiple antennas, which may be used to employ techniques 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 may support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located in 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 in diverse geographic locations. The base station 105 may have an antenna array with several rows and columns of antenna ports that the base station 105 may use to support beamforming of communications with the UE 115. Similarly, the UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations. Additionally or alternatively, the antenna panels may support radio frequency beamforming for signals transmitted through the antenna ports.

[0099] A base station 105 or a UE 115 may use MIMO communications to exploit multipath signal propagation and increase spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such techniques may be referred to as spatial multiplexing. The multiple signals may be transmitted by a transmitting device via, for example, different antennas or different combinations of antennas. Similarly, the multiple signals may be received by a receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports used for channel measurements and reporting. MIMO techniques include single-user MIMO (SU-MIMO), in which multiple spatial layers are transmitted to the same receiving device, and multi-user MIMO (MU-MIMO), in which multiple spatial layers are transmitted to multiple devices.

[0100] Beamforming, sometimes referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used in a transmitting or receiving device (e.g., base station 105, UE 115) to shape or steer an antenna beam (e.g., transmit beam, receive beam) along a spatial path between the transmitting and receiving devices. Beamforming may be achieved by combining signals communicated through antenna elements of an antenna array such that some signals propagating in a particular orientation relative to the antenna array are subject to constructive interference and other signals are subject to destructive interference. Adjustment of signals communicated through antenna elements may include a transmitting or receiving device applying an amplitude offset, a phase offset, or both to signals carried through an antenna element associated with the device. The adjustment associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., relative to the antenna array of the transmitting or receiving device, or to some other orientation).

[0101] The base station 105 or the UE 115 may use beam sweeping techniques as part of a beamforming operation. For example, the base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to perform a beamforming operation for directional communication with the UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted by the base station 105 multiple times in different directions. For example, the base station 105 may transmit signals according to different beamforming weight sets associated with different directions of transmission. The transmissions in different beam directions may be used to identify (e.g., by a transmitting device such as the base station 105 or by a receiving device such as the UE 115) beam directions for subsequent transmissions or receptions by the base station 105.

[0102] Some signals, such as data signals associated with a particular receiving device, may be transmitted by the base station 105 in a single beam direction (e.g., a direction associated with a receiving device, such as the UE 115). In some examples, a beam direction associated with a transmission along a single beam direction may be determined based on signals transmitted in one or more beam directions. For example, the UE 115 may receive one or more of the signals transmitted by the base station 105 in different directions and may report to the base station 105 an indication of the signal that the UE 115 received with the best signal quality or an otherwise acceptable signal quality.

[0103] In some examples, transmission by a device (e.g., by the base station 105 or the UE 115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from the base station 105 to the UE 115). The UE 115 may report feedback indicating precoding weights for one or more beam directions, and the feedback may correspond to a configured number of beams across the system bandwidth or one or more subbands. The base station 105 may transmit a reference signal (e.g., a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS)) that may be precoded or amplicoded. The UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook). These techniques are described with reference to signals transmitted in one or more directions by the base station 105, although the UE 115 may employ similar techniques for transmitting a signal multiple times in different directions (e.g., to identify a beam direction for subsequent transmission or reception by the UE 115) or for transmitting a signal in a single direction (e.g., to transmit data to a receiving device).

[0104] A receiving device (e.g., UE 115) may attempt multiple receiving configurations (e.g., directional listening) when receiving various signals, such as synchronization signals, reference signals, beam selection signals, or other control signals, from the base station 105. For example, the receiving device may attempt multiple receiving directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of the antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of the antenna array, any of which may be referred to as "listening" according to different receiving configurations or receiving directions. In some examples, the receiving device may use a single receiving configuration to receive along a single beam direction (e.g., when receiving a data signal). The single receiving configuration may be aligned to a beam direction determined based on listening according to different receiving configuration directions (e.g., a beam direction determined to have the highest signal strength, the highest signal-to-noise ratio (SNR), or otherwise acceptable signal quality based on listening according to multiple beam directions).

[0105] The wireless communication system 100 may be a packet-based network that operates according to a layered protocol stack. In the user plane, communication at 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 over logical channels. The Medium Access Control (MAC) layer may perform priority handling and multiplexing of logical channels into transport channels. The MAC layer may also use error detection techniques, error correction techniques, or both to support retransmissions at the MAC layer to improve link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer may establish, configure, and maintain an RRC connection between the UE 115 and the base station 105 or core network 130, which supports radio bearers for user plane data. In the physical layer, the transport channels may be mapped to physical channels.

[0106] The UE 115 and the base station 105 may support retransmission of data to increase the likelihood that the data is successfully received. Hybrid Automatic Repeat Request (HARQ) feedback is one technique for increasing the likelihood that the data is correctly received over the 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 throughput at the MAC layer in poor radio conditions (e.g., low signal-to-noise conditions). In some examples, a device may support same-slot HARQ feedback, in which the device may provide HARQ feedback in a particular slot for data received in a previous symbol in that slot. In other cases, the device may provide HARQ feedback in a subsequent slot or according to some other time interval.

[0107] One or more UEs 115 may transmit UCI to the base station 105. In some cases, the UE 115 may utilize sequence-based transmission rather than channel coding to transmit the UCI. The UE 115 may generate a sequence for the sequence-based transmission. The sequence may be generated by the UE 115 based on a determination that the UCI payload meets a threshold size condition, and the UE 115 may map the UCI payload to an uplink control sequence. The UE 115 may transmit a PUCCH to the base station 105 including an uplink control sequence corresponding to the UCI payload. The base station 105 may receive the uplink control sequence and determine the UCI based on the sequence. In some cases, the base station 105 may transmit multiplexing information to facilitate its transmission of the uplink control sequence by the multiple UEs 115.

[0108] The actions performed by the UE 115 described herein may be implemented to realize one or more potential advantages. One implementation may enable the UE 115 to save power and extend battery life by reducing the number of retransmissions of UCI for a particular application by improving the performance of PUCCH reception at the base station 105. In addition, the actions performed by the UE 115 may also improve the reliability of the service at the corresponding UE 115 by improving the efficiency of transmission of UCI and corresponding channel quality information provided in the UCI.

[0109] FIG. 2 illustrates an example of a wireless communication system 200 supporting sequence-based PUCCH transmission according to aspects of the disclosure. In some examples, the wireless communication system 200 may implement aspects of the wireless communication system 100. The wireless communication system 200 may include a UE 115-a and a UE 115-b, both of which may be examples of a UE 115 as described with respect to FIG. 1. The wireless communication system 200 may also include a base station 105-a, which may be an example of a base station 105 as described with respect to FIG. 1. The UEs 115-a and 115-b may communicate with the base station 105-a via communication links 205-a and 205-b, respectively. The UE 115 may utilize sequence-based transmission to generate sequences for transmission of UCI in the PUCCH 210 transmitted in the communication link 205.

[0110] One or more UEs 115 may be served by the base station 105. The UE 115 may generate and transmit UCI to the base station 105-a using the PUCCH 210. The UCI may include a set of information, such as SR, HARQ feedback (e.g., ACK / NACK), CQI information, or other information including information about channel quality measurements and transmission scheduling. The UE 115-a may determine that the UCI payload size k meets a threshold size condition, such as k≦11 or k≦19. In this case, the UE 115-a may determine to perform sequence-based transmission of UCI in the PUCCH 210-a. In some cases, the UE 115-a may be equipped with multiple transmit antennas. In these cases, the UE 115-a may select a base sequence x and may multiply the pointwise base sequence with an antenna-specific sequence of equal length. The antenna-specific sequence may be referred to as a signature sequence. The signature sequences in different transmit antennas may be orthogonal to each other.

[0111] For each PUCCH resource, the base station 105-a may configure the UE 115-a for the number of transmit antennas expected for transmission on this PUCCH resource. Alternatively, single-antenna or multi-antenna transmissions may be defined in a different PUCCH format (e.g., different from the existing PUCCH formats 0, 1, 2, 3, 4 in NR).

[0112] In some cases, the UE 115-a and the UE 115-b may be configured to transmit sequences on the same set of resources. UE For the UEs 115, the base station 105-a may select a multiplexing index l, which may be different for each UE 115-a and 115-b. u ∈{0,1,...,K UE The UE 115 may indicate a multiplexing index, {PUCCH resource ID, -1} to the UE 115-a and the UE 115-b. The multiplexing index may be associated with a PUCCH resource, such as part of a PUCCH resource configuration. The PUCCH resource configuration may be indicated to the UE 115 and may include the multiplexing index information. The UE 115 may generate sequences based on a separate sequence pool (e.g., from a sequence pool specific to each UE 115-a or UE 115-b) or may generate sequences based on a joint sequence pool (e.g., one sequence pool used by both the UE 115-a and the UE 115-b).

[0113] Thus, in some cases, the UE 115-a and the UE 115-b may both generate sequences. The UE 115-a and the UE 115-b may both generate sequences by first determining whether the UCI to be transmitted meets a threshold payload size. Then, each UE 115 may convert the UCI to a decimal equivalent. Based on the received multiplexing index, the UE 115-a and the UE 115-b may pick a sequence from a sequence pool. The sequence pool may be a set of sequences from which the UE 115 may select a sequence for the PUCCH 210 transmission. A matrix of sequences may be an example of a sequence pool, or the sequence pool may be another structure or set of sequences. The UE 115-a and the UE 115-b may select a sequence from the sequence pool either based on a joint sequence pool or based on a separate sequence pool (specific to each UE 115) and generate a complete sequence based on the sequence selected from the pool (based on the multiplexing index) and the decimal equivalent of the UCI. The UE 115-a may transmit the sequence on PUCCH 210-a via communication link 205-a to the base station 105-a. The UE 115-b may transmit the generated sequence on PUCCH 210-b via communication link 205-b. In some cases, the sequences transmitted by the UE 115-a and the UE 115-b may be transmitted on overlapping resources.

[0114] The base station 105-b may receive both generated sequences and may determine the separate UCI payloads by associating the received uplink control sequences with corresponding sequence indexes of one or more sets of uplink control sequences.

[0115] In some cases, only one UE 115 (e.g., UE 115-a) may transmit the generated uplink control sequence to the base station 105-a. In other cases, both UEs 115-a and 115-b, as well as other UEs 115 not shown in the wireless communication system 200, may transmit the generated uplink control sequence. In some cases, uplink control sequences transmitted by different UEs 115 may be transmitted on overlapping resources or uplink control sequences transmitted by different UEs 115 may be transmitted on different non-overlapping resources (e.g., time domain resources and frequency domain resources).

[0116] 3A and 3B illustrate examples of process diagrams 301 and 302 supporting sequence-based PUCCH transmission according to aspects of the disclosure. In some examples, the process diagrams 301 and 302 may implement aspects of the wireless communication systems 100 and 200. For example, the UE 115 may generate an uplink control sequence based on steps outlined in the process diagrams 301 and 302. The UE 115, such as the UE 115-a or UE 115-b as described with respect to FIG. 2 or the UE 115 as described with respect to FIG. 1, may generate and transmit a sequence based on the process diagrams 301 and 302. The process diagram 301 may illustrate a general process for generating a sequence and transmitting a PUCCH based on the sequence, and the process diagram 302 may illustrate an example of sequence-based PUCCH transmission for binary phase shift keying (BPSK) or quadrature phase shift keying (QPSK) Gold or M-sequence generation.

[0117] In process diagram 301, the UE 115 may first take information bits 305 to be transmitted in the UCI. The UE 115 may generate a sequence at 310-a based on a multiplexing index and other parameters. The UE 115 may in some cases apply antenna-specific masking at 315, and in some cases apply transform precoding or DFT 320-a to the generated sequence. The UE 115 may map the generated sequence to resource elements at 325-b and transmit the sequence in the PUCCH 330-a (e.g., PUCCH 210).

[0118] In some cases, one UE 115 may generate and transmit an uplink sequence over a set of PUCCH resources. In the sequence generation step 310, for a single UE 115, N, M,

[0119]

number

[0120] may be given, where M=2 k M is the sequence pool.

[0121]

number

[0122] N may be the length of each sequence, and k may be the number of UCI bits. The set of sequences (i.e., sequence pool or codebook) is a matrix of size N × M.

[0123]

number

[0124] where each row vector can be a sequence.

[0125]

number

[0126] may be an example of a sequence pool, but in other cases the sequence pool may be represented by other structures.

[0127]

number

[0128] may be generated for each cell. Then, the UE 115 may generate a binary string a (e.g., a 0 , a 1 , ..., a k-1 ) to l a A binary string can be converted to a decimal value that can be represented by the formula

[0129]

number

[0130] By, or by the formula

[0131]

number

[0132] or by other formulas to convert the column to decimal values. a can be converted to

[0133] The UE 115 then performs the sequence

[0134]

number

[0135] and this sequence is

[0136]

number

[0137] (l a +1)th column. In this case, the column index may correspond to the first column

[0138]

number

[0139] but

[0140]

number

[0141] It may start from 0 so that

[0142] At 315, the UE 115 may apply antenna-specific masking in some cases. This may be applied in the case of single-UE MIMO, and thus when the UE 115 is equipped with multiple transmit antennas, the UE 115 may transmit using the multiple transmit antennas to obtain diversity gain. This transmission may be achieved by using the same base sequence x and multiplying x pointwise (e.g., entry-wise or bit-wise) with an antenna-specific sequence of equal length. This antenna-specific sequence may be called a signature sequence. The signature sequences in different transmit antennas may be orthogonal to each other. Specifically, two complex-valued sequences a and b of length N may be

[0143]

number

[0144] where * denotes the complex conjugate.

[0145] For each PUCCH resource, the base station 105 may configure the UE 115 for the number of transmit antennas expected for transmission on this PUCCH resource. Alternatively, whether to use single-antenna transmission or multiple-antenna transmission and the transmission configuration may be defined as different PUCCH formats. For example, these PUCCH formats may be different from the existing PUCCH formats 0, 1, 2, 3, 4 for NR.

[0146] For example, if the UE 115 has two transmit antennas, the signature for each antenna may be: d (0) =[1,1,...,1]=>y (0) (k) = x(k) d (0) (k) and d (1) =[1,-1,…,1,-1]=>y (1) (k) = x(k) d (1) (k) It could be.

[0147] In another example, if the UE has four transmit antennas, the signature for each antenna may be: d (0) =[1,1,...,1] d (1) =[1,j,-1,-j,...,1,j,-1,-j] d (2) =[1,-1,...,1,-1] d (3) =[1,-j,-1,j,...,1,-j,-1,j] It could be.

[0148] Alternatively, the set of signatures for a UE with four antennas may be: d (0) =[1,1,...,1,1] d (1) =[1,-1,...,1,-1] d (2) =[1,1,-1,-1,...,1,1,-1,-1] d (3)=[1,-1,-1,1,...,1,-1,-1,1] It could be.

[0149] In some cases, multiple UEs 115 may transmit sequences on the same set of resources. UE For the UEs 115, the base station 105 may select a multiplexing index l, which may be different for different UEs 115. u ∈{0,1,...,K UE The multiplexing index may indicate {PUCCH resource ID, PUCCH resource ID, -1} to the UE 115. The multiplexing index may be associated with a PUCCH resource, such as part of a PUCCH resource configuration. The PUCCH resource configuration may be indicated to the UE 115 and may include the multiplexing index information. In the case of multiple UEs 115, the UEs 115 may generate sequences based on separate sequence pools (e.g., from sequence pools specific to each UE 115) or may generate sequences based on a joint sequence pool (e.g., one sequence pool used by two or more UEs 115).

[0150] For separate sequence pools, each MI is of size M=2 k In these cases,

[0151]

number

[0152] is the multiplexing index l u The UE 115 having UCI a may have a sequence pool or codebook associated with the sequence

[0153]

number

[0154] In some cases, one sequence pool may be sent.

[0155]

number

[0156] is a separate sequence pool.

[0157]

number

[0158] from,

[0159]

number

[0160] may be generated by pointwise multiplexing each column of x with a fixed-length sequence of length N. For example,

[0161]

number

[0162] It is.

[0163] Therefore, the UE 115 first identifies the UCI sequence a and finds its decimal equivalent l a and use MI to

[0164]

number

[0165] Select and then sequence

[0166]

number

[0167] may be generated.

[0168] For joint sequence pools, size M=2 k+rA single sequence pool of

[0169]

number

[0170] where r=log 2 K UE One UE 115 of the set of UEs 115 using the joint sequence pool receives the UCI payload a and the multiplexing index l u Based on the integer l b and the UE 115 may determine a sequence

[0171]

number

[0172] The UE 115 may select the multiplexing index l from the codebook. u There may be multiple ways to generate a sequence from UCI a (or j). In one case, the UE 115 first u Let u = u 0 ,...,u r-1 The UE 115 may then concatenate u and a to generate a new binary sequence b of length k+r, where u may be prepended to a (i.e., b=[u,a]) or u may be appended to a (i.e., b=[a,u]). The UE 115 may then convert the binary sequence b to a decimal integer l b can be converted to

[0173] In another case, l b is,l b =2 r l a +l u or b =l a +l u 2 k These options can be set to the multiplexing index l u(or j) and UCI a may be mathematically the same as the first approach used by the UE 115 to generate a sequence from UCI a, but may be presented differently.

[0174] The sequence pool itself (whether a separate or joint sequence pool) may be based on different designs: for example, the sequence pool may be based on Zadoff-Chu (ZC) sequences, BPSK / QPSK modulated Gold / M sequences, or DFT sequences.

[0175] In the example DFT sequence, M is 2 k OR 2 k+r p can be any power of 2. p is a cell ID or a multiplexing index l u (or j). A DFT-based sequence pool with parameter p is a function of the N rows of the M × M DFT matrix.

[0176]

number

[0177] The element at the sth row and tth column can be generated by sampling

[0178]

number

[0179] The UE can determine which N rows to sample, which can be determined by the function

[0180]

number

[0181] can be mathematically equivalent to:

[0182]

number

[0183] , m∈{0,...,M-1}, n∈{0,...,N-1}.

[0184] For example, a DFT-based joint sequence pool M=2, where k is the UCI payload size. k+r If , 2 r may indicate the number of UEs 115 that may be configured to be multiplexed on the same resource.

[0185]

number

[0186] are the N rows of the M × M DFT matrix

[0187]

number

[0188] can be formed by sampling with a sampling function f. For example,

[0189]

number

[0190] It is.

[0191] Given a UCI payload a and a multiplexing index j, the UE 115 determines a sequence index l based on an indication received from the base station, which may be unique for each UE 115. b For example, l b =2 k l u +l a If , the generated sequence is

[0192]

number

[0193] where:

[0194]

number

[0195] is a UE specific term. In another example, b =2 r l a +l u If , the generated sequence is

[0196]

number

[0197] where:

[0198]

number

[0199] is a UE-specific term. The configuration described herein may be interpreted as having a single set of base-M sequences, where each UE may map its corresponding UCI to a base sequence from the set. The UE may then multiply the base sequence with the UE-specific term. This may be an example of a sequence masking technique.

[0200] In some cases, at 320, the UE 115 may perform transform precoding after the sequence is generated and before the sequence is mapped to resource elements (i.e., subcarriers in an OFDM system). If transform precoding is not applied, the UE 115 may map the sequence in the frequency domain. If transform precoding is applied, the UE 115 may map the sequence in the time domain. If transform precoding is applied, transform precoding may be performed on each OFDM symbol.

[0201] For example, the PUCCH may be scheduled with one RB (e.g., 12 REs) and 14 OFDM symbols. In this case, the sequence length may be N=168. Thus, the UE 115 may map every length-12 subsequence to one OFDM symbol. The UE 115 may apply transform precoding (e.g., a 12-point DFT) to the length-12 subsequence on each OFDM symbol.

[0202] Based on generating the sequence using one or more of the sequence generation processes described herein, the UE 115 may then map 325 the generated sequence to the RE. After mapping the RE, the UE 115 may transmit 330 the generated mapped sequence in a PUCCH resource that the base station 105 may receive. The base station may then determine the UCI payload using the received sequence by associating the uplink control sequence with a corresponding sequence index of one or more sets of uplink control sequences.

[0203] In some cases, the UE 115 may generate a BPSK or QPSK modulated Gold sequence or M sequence to communicate PUCCH information. Process diagram 302 (of FIG. 3B) may represent an example process for generating a BPSK or QPSK modulated Gold sequence or M sequence to communicate PUCCH information. A BPSK modulated sequence may also be

[0204]

number

[0205] It may be a BPSK modulated sequence.

[0206]

number

[0207] BPSK modulation sequences may result in a lower peak-to-average power ratio (PAPR) compared to some other modulation types.

[0208] A Gold sequence may be a type of binary pseudorandom sequence that may be used for reference signals for different applications (e.g., CDMA, LTE, NR, or other applications). Gold sequences may be used as synchronization signals, DMRS, CSI-RS, or other reference signals. A Gold or M sequence is a sequence that is generated by multiplying the c init It can be initialized using a seed such as c init The seed is, for example, an integer between 0 and 2 31 It may correspond to an integer, such as a 31-bit integer, having a value up to -1.

[0209] Some common pseudorandom sequences can be defined by Gold sequences of length 31. The output sequence is of length M PN , where n=0, 1, ..., M PN -1 can be defined by: c(n) = (x 1(n+N c )+x 1 (n+N c )) mod 2 x 1 (n+31)=(x 1 (n+3)+x 1 (n)) mod 2 x 2 (n+31)=(x 2 (n+3)+x 2 (n+2)+x 2 (n+1)+x 2 (n)) mod 2 Here, N c = 1600, and the first m-sequence x 1 (n) is x 1 (0)=1, x 1 It can be initialized with (n)=0, n=1, 2, ..., 30. The second m-sequence x 2 The initialization of (n) is

[0210]

number

[0211] where the value may depend on the application of the sequence.

[0212] The UE 115 receives a seed for the Gold sequence (e.g., c init ) may be used to carry the UCI payload. For example, k<31 bits, and a 0 , a 1 , ..., a k-1 For UCI payloads of c init is init =2 k ·n ID +l a where l a is the decimal value of the UCI payload. a teeth,

[0213]

number

[0214] n ID may be determined based on a UE ID, a cell ID, or a multiplexing ID, or a combination thereof. In some cases, the seed may be used to generate a binary Gold or M sequence of length 2N, which may then be QPSK modulated to generate a composite sequence for transmission. In some cases, the seed may generate a binary Gold or M sequence of length N, which may then be QPSK modulated to generate a composite sequence for transmission.

[0215]

number

[0216] It may be used to generate a composite sequence using BPSK modulation.

[0217]

number

[0218] BPSK modulation may result in a smaller PAPR.

[0219] For either Gold or M sequence generation, or QPSK or BPSK modulation, the UE 115 may first use the UCI payload 335 to perform the sequence generation process 310-b. The UE may first use the UCI payload 335 to determine a seed for the Gold sequence at 340. The UE 115 may then use the generated seed to generate the Gold sequence at 345. At 350, the UE 115 may select QPSK or BPSK modulation for the Gold sequence.

[0220]

number

[0221] In some cases, the UE 115 may perform transform precoding at 320-b on the modulation sequence. Whether the UE 115 performs transform precoding or not at 320-b, the UE 115 may perform RE mapping at 325-b. After completion of RE mapping and sequence generation, the UE 115 may transmit the PUCCH to the base station 105 at 330-b.

[0222] 4 illustrates an example of a process flow 400 supporting sequence-based PUCCH transmission according to aspects of the disclosure. In some examples, the process flow 400 may implement aspects of the wireless communication systems 100 and 200 and process diagram 300. The process flow 400 may include a UE 115-c, which may perform functions similar to those described with reference to the UE 115 of the wireless communication system 100 and the UEs 115-a and 115-b of the wireless communication system 200. The UE 115-b may also generate an uplink control sequence according to the process diagram 300. The process flow 400 may also include a base station 105-b, which may perform processes similar to those of the base station 105 as described with respect to the wireless communication systems 100 and 200.

[0223] At 405, the UE 115-c may identify that the UCI payload meets a threshold size condition. At 410, the base station 105-b may identify that the UCI payload is to be transmitted by the UE 115-c as an uplink control sequence. The base station 105-b may identify that the UCI payload is to be transmitted as an uplink control sequence if the UCI payload meets the threshold size condition.

[0224] At 415, the UE 115-c may map the UCI payload to the uplink control sequence based on the UCI payload satisfying a threshold size condition. The UCI payload satisfying the threshold size condition may be based on the UCI payload being less than or equal to a predetermined maximum payload size. For example, identifying the UCI payload as satisfying the threshold size condition may include identifying the UCI payload as being less than or equal to a predetermined maximum payload size.

[0225] The mapping may include converting the UCI payload to a decimal value and selecting an uplink control sequence from a set of uplink control sequences based on the decimal value. The number of uplink control sequences in the set of uplink control sequences may be 2 k The selection of an uplink control sequence from the set of uplink control sequences may include selecting an uplink control sequence associated with the decimal value.

[0226] In some cases, the UE 115-c may multiply the uplink control sequence with the signature sequence before transmitting the uplink control sequence at 425. For example, the transmission of the uplink control sequence includes transmitting a result of multiplying the uplink control sequence with the signature sequence. The UE 115-c may receive a multiplexing index from the base station 105-b, and the UE 115-c may generate the signature sequence based on the multiplexing index. In some cases, the uplink control sequence and the signature sequence may be the same length. The signature sequence may be associated with one transmit antenna of the set of transmit antennas of the UE 115-c. In some cases, the signature sequence associated with one transmit antenna of the set of transmit antennas may be orthogonal to other signature sequences associated with other transmit antennas of the set of transmit antennas of the UE 115-c. In other cases, the signature sequence may be specific to a different UE 115. For example, the signature sequence may be a UE-specific signature sequence. A UE-specific signature sequence may be applied to the selected sequence, and the base station 105-b may use the signature sequence to distinguish different PUCCHs transmitted from different UEs 115. In some cases, the UEs 115 may utilize the signature sequence to distinguish transmit antennas, and the UEs 115 may also use the signature sequence corresponding to the UEs 115 to distinguish the UEs 115.

[0227] The UE 115-c may receive an indication that the UE 115-c should use some or all transmit antennas of the set of transmit antennas to transmit the PUCCH at 425. The indication may be associated with a format of the PUCCH.

[0228] The UE 115-c may receive a multiplexing index from the base station 105-b. The multiplexing index may be different from other multiplexing indexes that may be provided to other UEs 115 that are also scheduled to transmit using resources assigned to the UE 115-c for the PUCCH. The UE 115-c may use the multiplexing index to map the UCI payload to the uplink control sequence. The multiplexing index may be associated with the PUCCH resource. In using the multiplexing index to map the UCI payload to the uplink control sequence, the UE 115-c may select an uplink control sequence from the set of uplink control sequences based on the multiplexing index. The set of uplink control sequences may include a set of column vectors, and each column vector may be one sequence from the set of sequences. The UE 115-c may select an uplink control sequence from one column vector from the set of column vectors of the set of uplink control sequences.

[0229] In other cases where the UE 115-c uses a multiplexing index to map the UCI payload to the uplink control sequence, the UE 115-b may select the uplink control sequence based on the UCI payload and the multiplexing index. The set of uplink control sequences may include a set of column vectors, and each column vector may be one sequence of the set of sequences. The uplink control sequence may correspond to one column vector of the set of column vectors. When selecting an uplink control sequence from the set of uplink control sequences, the UE 115-c may convert the multiplexing index to a binary string. The UE 115-c may then also concatenate the binary string with the UCI payload to form a concatenated string, convert the concatenated string to a decimal value, and select an uplink control sequence from the set of uplink control sequences based on the decimal value representing the concatenated string.

[0230] In other cases, the selection of the uplink control sequence from the set of uplink control sequences includes converting the UCI information payload to a decimal value. In these cases, the UE 115-c may also sum a first multiple of the decimal value representing the UCI payload with a second multiple of the multiplexing index to form a summed decimal value. The UE 115-c may select the uplink control sequence from the set of uplink control sequences based on the summed decimal value. In some cases, the first multiple may be based on a number of UEs 115 scheduled to transmit using resources assigned to the UE 115-c for the PUCCH, where the number of UEs 115 may include the UE 115-c and other UEs 115, and the second multiple may be 1. In other cases, the first multiple may be 1 and the second multiple may be based on the number of bits of the UCI payload.

[0231] Mapping the UCI payload to the uplink control sequence may also include the UE 115-c selecting an uplink control sequence from one or more sets of uplink control sequences, where the sequences in the one or more sets of uplink control sequences may be ZC sequences, binary or QPSK modulated Gold or M sequences, or DFT-based sequences. The one or more sets of uplink control sequences may include DFT-based sequences that may be based on deterministic sampling of row entries in selected columns of a DFT matrix according to a sampling function. In other cases, the one or more sets of uplink control sequences include Inverse Discrete Fourier Transform (IDFT)-based sequences that may be based on deterministic sampling of row entries in selected columns of an IDFT matrix according to a sampling function.

[0232] The UE 115-c may apply a transform precoding operation to the uplink control sequence and may map the uplink control sequence to frequency domain resources after application of the transform precoding operation and prior to transmission of the PUCCH. In other cases, the UE 115-c may refrain from applying a transform precoding operation to the uplink control sequence and the UE 115-c may map the uplink control sequence to time domain resources prior to transmission of the PUCCH. For example, the uplink control sequence may be non-transform precoded.

[0233] In some cases, the UE 115-c may select the uplink control sequence using a BPSK or QPSK modulated Gold or M sequence. In this case, the UE 115-c may generate a seed for the BPSK or QPSK modulated Gold or M sequence based on the UCI payload. The UE 115-c may select the BPSK or QPSK modulated Gold or M sequence based on the generated seed. The UE 115-c may map the UCI payload to a seed and select the BPSK or QPSK modulated Gold or M sequence based on the mapping. The generation of the seed may include the UE 115-c generating the seed based on the UCI payload and a UE ID, a cell ID, or a multiplexing index, or a combination thereof.

[0234] In some cases, the UE 115-c may receive a multiplexing index from the base station 105-b, which may be different from other multiplexing indexes provided to other UEs 115 that are also scheduled to transmit using resources assigned to the UE 115-c for the PUCCH. The UE 115-c may use the multiplexing index to map the UCI payload to generate a seed. To use the multiplexing index to map the UCI payload to generate a seed, the UE 115-c may convert the multiplexing index to a binary string, concatenate the binary string with the UCI payload to form a concatenated string, convert the concatenated string to a decimal value, and generate a seed based on the decimal value representing the concatenated string. The UE 115-c may also convert the UCI payload to a decimal value, sum a first multiple of the decimal value representing the UCI payload with a second multiple of the multiplexing index to form a summed decimal value, and generate a seed based on the summed decimal value.

[0235] At 420, the base station 105-b may identify one or more sets of uplink control sequences from which the uplink control sequences are to be selected by the UE 115-c.

[0236] At 425, the UE 115-c may transmit a PUCCH including an uplink control sequence. The uplink control sequence may represent a UCI payload. The base station 105-b may receive the PUCCH including the uplink control sequence. The transmission of the PUCCH may include transmitting the uplink control sequence as a non-coherent transmission without DMRS.

[0237] These implementations may enable the UE 115-c to conserve power and extend battery life by reducing the number of retransmissions of UCI for a particular application by improving the performance of PUCCH reception at the base station 105-b. In addition, the actions performed by the UE 115-c may also improve the reliability of services at the corresponding UE 115-c by improving the efficiency of transmission of UCI and corresponding channel quality information provided in the UCI.

[0238] At 430, the base station 105-b may determine the UCI payload by associating the uplink control sequence with a corresponding sequence index of one or more sets of uplink control sequences. The sequence index may be a decimal value of the UCI payload. The determination of the UCI payload may include the base station 105-b identifying that the uplink control sequence was multiplied with a signature sequence prior to transmission of the uplink control sequence. The signature sequence and the uplink control sequence prior to multiplication with the signature sequence may be of the same length. The signature sequence may be associated with one transmit antenna of the set of transmit antennas of the UE 115-c. In some cases, the base station 105-b may transmit an indication that the UE 115-c should use some or all transmit antennas of the set of transmit antennas when transmitting the PUCCH. The indication may be associated with a format of the PUCCH. The base station 105-b may transmit a multiplexing index to the UE 115-c, which may be different from other multiplexing indexes that may be provided to other UEs 115 that may also be scheduled to transmit using resources assigned to the UE 115-c for the PUCCH. The multiplexing index may be associated with the PUCCH. One or more sets of uplink control sequences of one of the sets of uplink control sequences and the set of uplink control sequences may correspond to the multiplexing index. Additionally, the one or more sets of uplink control resources from which the uplink control sequences are selected may be common to the UE 115-c and the other UEs 115.

[0239] 5 illustrates a block diagram 500 of a device 505 supporting sequence-based PUCCH transmission according to an aspect of the disclosure. The device 505 may be an example of an aspect of a UE 115 as described herein. The device 505 may include a receiver 510, a communications manager 515, and a transmitter 520. The device 505 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

[0240] The receiver 510 may receive information such as packets, user data, or control information associated with various information channels (e.g., information regarding a control channel, a data channel, and sequence-based PUCCH transmissions, etc.). The information may be passed to other components of the device 505. The receiver 510 may be an example of an aspect of a transceiver 820 described with reference to FIG. 8. The receiver 510 may utilize a single antenna or a set of antennas.

[0241] The communications manager 515 may identify the UCI payload as meeting a threshold size condition, map the UCI payload to an uplink control sequence based on the UCI payload meeting the threshold size condition, and transmit a PUCCH including the uplink control sequence, where the uplink control sequence represents the UCI payload. The communications manager 515 may be an example of an aspect of the communications manager 810 described herein.

[0242] The communications manager 515, or subcomponents thereof, 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 communications manager 515, or subcomponents thereof, 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, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in this disclosure.

[0243] The communications manager 515 or its subcomponents may be physically located in various locations, including being distributed such that portions of the functionality are implemented at different physical locations by one or more physical components. In some examples, the communications manager 515 or its subcomponents may be separate and distinct components according to various aspects of the present disclosure. In some examples, the communications manager 515 or its subcomponents may be combined with one or more other hardware components, including, but not limited to, an input / output (I / O) component, a transceiver, a network server, another computing device, one or more other components described in this disclosure, or combinations thereof according to various aspects of the present disclosure.

[0244] The transmitter 520 may transmit signals generated by other components of the device 505. In some examples, the transmitter 520 may be co-located with the receiver 510 within a transceiver module. For example, the transmitter 520 may be an example of an aspect of the transceiver 820 described with reference to FIG. 8. The transmitter 520 may utilize a single antenna or a set of antennas.

[0245] In some examples, the communications manager 515 described herein may be implemented as a chipset of a wireless modem, and the receiver 510 and the transmitter 520 may be implemented as a set of analog components (e.g., amplifiers, filters, phase shifters, antennas, etc.). The wireless modem may obtain and decode signals from the receiver 510 via a receive interface and output signals for transmission to the transmitter 520 via a transmit interface.

[0246] The actions performed by the communications manager 515 described herein may be implemented to realize one or more potential advantages. One implementation may enable the UE 115 to conserve power and extend battery life by reducing the number of retransmissions of UCI for a particular application by improving performance of PUCCH reception at the base station 105. In addition, the actions performed by the communications manager 515 may also improve reliability of services at the corresponding UE 115 by improving efficiency of transmission of UCI and corresponding channel quality information provided in the UCI.

[0247] 6 illustrates a block diagram 600 of a device 605 supporting sequence-based PUCCH transmission according to an aspect of the disclosure. The device 605 may be an example of an aspect of a device 505 or a UE 115 as described herein. The device 605 may include a receiver 610, a communications manager 615, and a transmitter 635. The device 605 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

[0248] The receiver 610 may receive information such as packets, user data, or control information associated with various information channels (e.g., information regarding a control channel, a data channel, and sequence-based PUCCH transmissions, etc.). The information may be passed to other components of the device 605. The receiver 610 may be an example of an aspect of a transceiver 820 described with reference to FIG. 8. The receiver 610 may utilize a single antenna or a set of antennas.

[0249] The communications manager 615 may be an example of an aspect of the communications manager 515 as described herein. The communications manager 615 may include a threshold component 620, a mapping component 625, and an uplink control sequence component 630. The communications manager 615 may be an example of an aspect of the communications manager 810 as described herein.

[0250] The threshold component 620 may identify the UCI payload as meeting a threshold size condition. The mapping component 625 may map the UCI payload to an uplink control sequence based on the UCI payload meeting the threshold size condition. The uplink control sequence component 630 may transmit a PUCCH including an uplink control sequence, where the uplink control sequence represents the UCI payload.

[0251] The transmitter 635 may transmit signals generated by other components of the device 605. In some examples, the transmitter 635 may be co-located with the receiver 610 within a transceiver module. For example, the transmitter 635 may be an example of an aspect of the transceiver 820 described with reference to FIG. 8. The transmitter 635 may utilize a single antenna or a set of antennas.

[0252] A processor of the UE 115 (e.g., controlling the receiver 610, the transmitter 635, or the transceiver 820) may efficiently determine that the UCI payload meets a threshold size condition. The processor of the UE 115 may turn on one or more processing units to map the UCI payload to an uplink control sequence to utilize sequence-based transmission. The processor of the UE 115 may also operate the transmitter 635 to transmit the generated uplink control sequence, which may be transmitted to the base station 105. The operation of the processor may improve the efficiency of the UE 115 by improving performance of PUCCH reception in low SNR cases and other cases.

[0253] 7 illustrates a block diagram 700 of a communications manager 705 supporting sequence-based physical uplink control channel transmission according to an aspect of the disclosure. The communications manager 705 may be an example of an aspect of the communications manager 515, communications manager 615, or communications manager 810 described herein. The communications manager 705 may include a threshold component 710, a mapping component 715, an uplink control sequence component 720, a decimal converter 725, a sequence selection component 730, a signature sequence component 735, a multiplexing component 740, a binary converter 745, a seed generation component 750, and a precoding component 755. Each of these modules may communicate directly or indirectly with each other (e.g., via one or more buses).

[0254] The threshold component 710 may identify that the UCI payload meets a threshold size condition. In some examples, the UCI payload meeting the threshold size condition may be based on the UCI payload being smaller than or equal to a predetermined maximum payload size. The threshold component 710 may identify that the UCI payload is smaller than or equal to a predetermined maximum payload size.

[0255] The mapping component 715 may map the UCI payload to the uplink control sequence based on the UCI payload satisfying a threshold size condition. In some examples, the mapping component 715 may map the UCI payload to a seed. In some examples, the mapping component 715 may use a multiplexing index to map the UCI payload to generate the seed. In some examples, the mapping component 715 may map the uplink control sequence to frequency domain resources after application of a transform precoding operation and prior to transmission of the physical uplink control channel. In some examples, the mapping component 715 may map the uplink control sequence to frequency domain resources prior to transmission of the physical uplink control channel, where the uplink control sequence is non-transform precoded.

[0256] The uplink control sequence component 720 may transmit a physical uplink control channel including an uplink control sequence, where the uplink control sequence represents a UCI payload. In some examples, the uplink control sequence component 720 may transmit the uplink control sequence as a non-coherent transmission without a demodulation reference signal.

[0257] The decimal converter 725 may convert the UCI payload to a decimal value. In some examples, the decimal converter 725 may convert the concatenated string to a decimal value. In some examples, the decimal converter 725 may convert the UCI payload to a decimal value. In some examples, the decimal converter 725 may sum a first multiple of the decimal value representing the UCI payload with a second multiple of the multiplexing index to form a summed decimal value.

[0258] In some cases, the first multiple is based on an amount of UEs scheduled to transmit using resources assigned to the UEs for the physical uplink control channel, the amount of UEs including the UE and other UEs, and the second multiple is 1. In some cases, the first multiple is 1 and the second multiple is based on an amount of bits of the UCI payload.

[0259] The sequence selection component 730 may select an uplink control sequence from the set of uplink control sequences based on a decimal value. In some examples, the sequence selection component 730 may select an uplink control sequence associated with a decimal value. In some examples, the sequence selection component 730 may select a set of uplink control sequences from one of the sets of uplink control sequences based on a multiplexing index. In some examples, the sequence selection component 730 may select an uplink control sequence from the set of uplink control sequences. In some examples, the sequence selection component 730 may select an uplink control sequence from the set of uplink control sequences based on a UCI payload and a multiplexing index. In some examples, the sequence selection component 730 may select an uplink control sequence from the set of uplink control sequences based on a decimal value representing a concatenated string.

[0260] In some examples, the sequence selection component 730 may select an uplink control sequence from the set of uplink control sequences based on the summed decimal values. In some examples, the sequence selection component 730 may select an uplink control sequence from one or more sets of uplink control sequences, where the sequences in the one or more sets of uplink control sequences are ZC sequences, 2-phase or 4-phase shift keying modulation Gold or M sequences, or discrete Fourier transform based sequences. The 2-phase or 4-phase shift keying modulation Gold or M sequences are π / 2 2-phase or 4-phase shift keying modulation Gold or M sequences. In some examples, the sequence selection component 730 may select a 2-phase or 4-phase shift keying modulation Gold or M sequence based on a generated seed. In some examples, the sequence selection component 730 may select a 2-phase or 4-phase shift keying modulation Gold or M sequence based on a mapping. In some cases, the amount of uplink control sequences in the set of uplink control sequences is 2 k greater than or equal to, where k is the payload size.

[0261] In some cases, the set or sets of uplink control sequences include discrete Fourier transform-based sequences based on deterministic sampling of row entries in selected columns of a discrete Fourier transform matrix according to a sampling function. In some cases, the set or sets of uplink control sequences include inverse discrete Fourier transform-based sequences based on deterministic sampling of row entries in selected columns of an inverse discrete Fourier transform matrix according to a sampling function.

[0262] The signature sequence component 735 may multiply the uplink control sequence with the signature sequence, and transmitting the uplink control sequence includes transmitting the uplink control sequence multiplied with the signature sequence. In some examples, the signature sequence component 735 may receive a multiplexing index from the base station and generate the signature sequence based on the multiplexing index. In some examples, the signature sequence component 735 may receive an indication that the UE should use some or all transmit antennas of the set of transmit antennas when transmitting the physical uplink control channel. In some cases, the signature sequence is associated with one transmit antenna of the set of transmit antennas of the UE. In some cases, the signature sequence associated with one transmit antenna of the set of transmit antennas is orthogonal to other signature sequences associated with other transmit antennas of the set of transmit antennas of the UE.

[0263] In some cases, the uplink control sequence and the signature sequence are the same length. In some cases, the indication includes an indication of the format of the physical uplink control channel. In some cases, the signature sequence is associated with the UE or with a physical uplink control channel resource that the UE uses to transmit the physical uplink control channel.

[0264] The multiplexing component 740 may receive a multiplexing index from the base station, where the multiplexing index is different from other multiplexing indexes provided to other UEs that are also scheduled to transmit using resources assigned to the UE for the physical uplink control channel. In some examples, the multiplexing component 740 may use the multiplexing index to map the UCI payload to an uplink control sequence.

[0265] In some examples, the multiplexing component 740 may receive a multiplexing index from the base station, where the multiplexing index is different from other multiplexing indexes provided to other UEs that are also scheduled to transmit using the resources assigned to the UE for the physical uplink control channel. In some examples, the multiplexing component 740 may convert the multiplexing index into a binary string. In some cases, the multiplexing index is associated with a physical uplink control channel resource.

[0266] The binary converter 745 may convert the multiplexing index into a binary string. In some examples, the binary converter 745 may concatenate the binary string with the UCI payload to form a concatenated string.

[0267] The seed generation component 750 may generate a seed for a two-phase or four-phase shift keying modulation Gold or M sequence based on the UCI payload. In some examples, the seed generation component 750 may generate a seed based on the UCI payload and a UE identifier, a cell identifier, or a multiplexing index, or a combination thereof. In some examples, the seed generation component 750 may generate a seed based on a decimal value representing a concatenated sequence. In some examples, the seed generation component 750 may generate a seed based on a summed decimal value.

[0268] The precoding component 755 may apply a transform precoding operation to the uplink control sequence.

[0269] 8 illustrates a diagram of a system 800 including a device 805 supporting sequence-based PUCCH transmission according to an aspect of the disclosure. The device 805 may be an example of or may include components of a device 505, a device 605, or a UE 115 as described herein. The device 805 may include components for two-way voice and data communication, including components for transmitting and receiving communications, including a communications 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 over one or more buses (e.g., bus 845).

[0270] The communications manager 810 may identify the UCI payload as meeting a threshold size condition, map the UCI payload to an uplink control sequence based on the UCI payload meeting the threshold size condition, and transmit a PUCCH including the uplink control sequence, where the uplink control sequence represents the UCI payload.

[0271] The I / O controller 815 may manage input and output signals for the device 805. The I / O controller 815 may also manage peripheral devices that are not integrated into the device 805. In some cases, the I / O controller 815 may represent a physical connection or port to an external peripheral device. In some cases, the I / O controller 815 may utilize an operating system such as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS / 2®, UNIX®, LINUX®, or another known operating system. In other cases, the I / O controller 815 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, the I / O controller 815 may be implemented as part of a processor. In some cases, a user may interact with the device 805 through the I / O controller 815 or through hardware components controlled by the I / O controller 815.

[0272] The transceiver 820 may communicate bidirectionally via one or more antennas, wired links, or wireless links as described herein. 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 for modulating packets and providing the modulated packets to an antenna for transmission, and for demodulating packets received from the antenna.

[0273] In some cases, a wireless device may include a single antenna 825. However, in some cases, the device may have two or more antennas 825 that may be capable of simultaneously transmitting or receiving multiple wireless transmissions.

[0274] 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 that includes instructions that, when executed, cause the processor to perform various functions described herein. In some cases, the memory 830 may include a basic input / output system (BIOS) that may control basic hardware or software operations, such as interaction with peripheral components or devices, among others.

[0275] 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, discrete gate or transistor logic components, discrete hardware components, 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 supporting sequence-based PUCCH transmission).

[0276] The code 835 may include instructions for implementing aspects of the disclosure, including instructions for supporting wireless communication. 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 executable by the processor 840, but may (e.g., when compiled and executed) cause a computer to perform functions described herein.

[0277] 9 illustrates a block diagram 900 of a device 905 supporting sequence-based PUCCH transmission according to an embodiment of the disclosure. The device 905 may be an example of an embodiment of a base station 105 as described herein. The device 905 may include a receiver 910, a communications manager 915, and a transmitter 920. The device 905 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

[0278] The receiver 910 may receive information such as packets, user data, or control information associated with various information channels (e.g., information regarding a control channel, a data channel, and sequence-based PUCCH transmissions, etc.). The information may be passed to other components of the device 905. The receiver 910 may be an example of an aspect of a transceiver 1220 described with reference to FIG. 12. The receiver 910 may utilize a single antenna or a set of antennas.

[0279] The communications manager 915 may identify a UCI payload to be transmitted by the UE as an uplink control sequence when the UCI payload meets a threshold size condition, identify one or more sets of uplink control sequences from which the uplink control sequence is to be selected by the UE, receive a PUCCH including the uplink control sequence, where the uplink control sequence represents the UCI payload, and determine the UCI payload by associating the uplink control sequence with a corresponding sequence index of the one or more sets of uplink control sequences. The communications manager 915 may be an example of an aspect of the communications manager 1210 described herein.

[0280] Communications manager 915, or subcomponents thereof, 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 communications manager 915, or subcomponents thereof, may be performed by a general purpose processor, a DSP, an application specific integrated circuit (ASIC), 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 in this disclosure.

[0281] The communications manager 915 or its subcomponents may be physically located in 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, the communications manager 915 or its subcomponents may be separate and distinct components according to various aspects of the present disclosure. In some examples, the communications manager 915 or its subcomponents may be combined with one or more other hardware components, including, but not limited to, an input / output (I / O) component, a transceiver, a network server, another computing device, one or more other components described in this disclosure, or combinations thereof according to various aspects of the present disclosure.

[0282] 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 within a transceiver module. For example, the transmitter 920 may be an example of an aspect of the transceiver 1220 described with reference to FIG. 12. The transmitter 920 may utilize a single antenna or a set of antennas.

[0283] 10 illustrates a block diagram 1000 of a device 1005 supporting sequence-based PUCCH transmission according to an aspect of the disclosure. The device 1005 may be an example of an aspect of a device 905 or a base station 105 as described herein. The device 1005 may include a receiver 1010, a communications manager 1015, and a transmitter 1040. The device 1005 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

[0284] The receiver 1010 may receive information such as packets, user data, or control information associated with various information channels (e.g., information regarding a control channel, a data channel, and sequence-based PUCCH transmissions, etc.). The information may be passed to other components of the device 1005. The receiver 1010 may be an example of an aspect of a transceiver 1220 described with reference to FIG. 12. The receiver 1010 may utilize a single antenna or a set of antennas.

[0285] The communications manager 1015 may be an example of an aspect of the communications manager 915 as described herein. The communications manager 1015 may include a UCI identification component 1020, a sequence identification component 1025, a PUCCH receiving component 1030, and a UCI determination component 1035. The communications manager 1015 may be an example of an aspect of the communications manager 1210 as described herein.

[0286] The UCI identification component 1020 may identify that the UCI payload is to be transmitted by the UE as an uplink control sequence when the UCI payload meets a threshold size condition. The sequence identification component 1025 may identify one or more sets of uplink control sequences from which the uplink control sequence is to be selected by the UE.

[0287] The PUCCH receiving component 1030 may receive a PUCCH including an uplink control sequence, where the uplink control sequence represents a UCI payload. The UCI determining component 1035 may determine the UCI payload by associating the uplink control sequence with a corresponding sequence index of one or more sets of uplink control sequences.

[0288] The transmitter 1040 may transmit signals generated by other components of the device 1005. In some examples, the transmitter 1040 may be co-located with the receiver 1010 within a transceiver module. For example, the transmitter 1040 may be an example of an aspect of the transceiver 1220 described with reference to FIG. 12. The transmitter 1040 may utilize a single antenna or a set of antennas.

[0289] 11 illustrates a block diagram 1100 of a communications manager 1105 supporting sequence-based PUCCH transmission according to an aspect of the disclosure. The communications manager 1105 may be an example of an aspect of the communications manager 915, the communications manager 1015, or the communications manager 1210 described herein. The communications manager 1105 may include a UCI identification component 1110, a sequence identification component 1115, a PUCCH receiving component 1120, a UCI determination component 1125, a signature sequence identifier 1130, a transmit antenna indicator 1135, and a multiplexing indicator 1140. Each of these modules may communicate directly or indirectly with each other (e.g., via one or more buses).

[0290] The UCI identification component 1110 may identify that the UCI payload is to be transmitted by the UE as an uplink control sequence when the UCI payload meets a threshold size condition.

[0291] In some examples, the UCI payload meeting the threshold size condition is based on the UCI payload being smaller than or equal to a predetermined maximum payload size. The UCI identification component 1110 may identify the UCI payload as being smaller than or equal to a predetermined maximum payload size.

[0292] The sequence identification component 1115 may identify one or more sets of uplink control sequences from which the uplink control sequence is to be selected by the UE.

[0293] In some cases, the set or sets of uplink control resources from which the uplink control sequence is selected includes a sequence that is a ZC sequence, a binary or quadrature phase shift keying modulation Gold or M sequence, a discrete Fourier transform based sequence, or an inverse discrete Fourier transform based sequence.

[0294] The PUCCH receiving component 1120 may receive a PUCCH including an uplink control sequence, where the uplink control sequence represents a UCI payload. In some examples, the PUCCH receiving component 1120 may receive the uplink control sequence as a non-coherent transmission without a demodulation reference signal.

[0295] The UCI determination component 1125 may determine the UCI payload by associating the uplink control sequence with a corresponding sequence index of one or more sets of uplink control sequences. In some cases, the sequence index is a decimal value of the UCI payload.

[0296] The signature sequence identifier 1130 may identify that the uplink control sequence has been multiplied with the signature sequence prior to transmission of the uplink control sequence. The signature sequence and the uplink control sequence prior to multiplication with the signature sequence may be the same length. In some cases, the signature sequence is associated with one transmit antenna of the set of transmit antennas of the UE. In some cases, the signature sequence associated with one transmit antenna of the set of transmit antennas is orthogonal to other signature sequences associated with other transmit antennas of the set of transmit antennas of the UE. In some cases, the signature sequence and the uplink control sequence prior to multiplication with the signature sequence are the same length.

[0297] The transmit antenna indicator 1135 may transmit an indication that the UE should use some or all of the transmit antennas in the set of transmit antennas when transmitting the PUCCH. In some cases, the indication includes an indication of the format of the PUCCH.

[0298] The multiplexing indicator 1140 may transmit a multiplexing index to the UE, where the multiplexing index is different from other multiplexing indexes provided to other UEs that are also scheduled to transmit using the resources assigned to the UE for PUCCH. In some cases, the multiplexing index is associated with a PUCCH resource.

[0299] In some cases, the set or sets of uplink control sequences from which the uplink control sequence is selected are a set of uplink control sequences of one set of the sets of uplink control sequences, and the set of uplink control sequences corresponds to a multiplexing index. In some cases, the set or sets of uplink control resources from which the uplink control sequence is selected are common to the UE and the other UEs.

[0300] 12 illustrates a diagram of a system 1200 including a device 1205 supporting sequence-based PUCCH transmission according to an aspect of the disclosure. The device 1205 may be an example of or may include components of a device 905, a device 1005, or a base station 105 as described herein. The device 1205 may include components for two-way voice and data communication, including components for transmitting and receiving communications, including a communications manager 1210, a network communications manager 1215, a transceiver 1220, an antenna 1225, a memory 1230, a processor 1240, and an inter-station communications manager 1245. These components may be in electronic communication via one or more buses (e.g., a bus 1250).

[0301] The communications manager 1210 may identify that the UCI payload is to be transmitted by the UE as an uplink control sequence when the UCI payload meets a threshold size condition, identify one or more sets of uplink control sequences from which the uplink control sequence is to be selected by the UE, receive a PUCCH including the uplink control sequence, where the uplink control sequence represents the UCI payload, and determine the UCI payload by associating the uplink control sequence with a corresponding sequence index of the one or more sets of uplink control sequences.

[0302] The network communications manager 1215 may manage communications with a core network (e.g., via one or more wired backhaul links). For example, the network communications manager 1215 may manage the transfer of data communications for client devices, such as one or more UEs 115.

[0303] The transceiver 1220 may communicate bidirectionally via one or more antennas, wired links, or wireless links as described herein. 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 for modulating packets and providing the modulated packets to an antenna for transmission, and for demodulating packets received from the antenna.

[0304] In some cases, a wireless device may include a single antenna 1225. However, in some cases, the device may have two or more antennas 1225 that may be capable of simultaneously transmitting or receiving multiple wireless transmissions.

[0305] The memory 1230 may include RAM, ROM, or a combination thereof. The memory 1230 may store computer-readable code 1235 including instructions that, when executed by a processor (e.g., the processor 1240), cause the device to perform various functions described herein. In some cases, the memory 1230 may include a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices, among other things.

[0306] The 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, the processor 1240 may be configured to operate a memory array using a memory controller. In some cases, the memory controller may be integrated into the processor 1240. The processor 1240 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1230) to cause the device 1205 to perform various functions (e.g., functions or tasks supporting sequence-based PUCCH transmission).

[0307] The inter-station communications manager 1245 may manage communications with other base stations 105 and may include a controller or scheduler for controlling communications with the UE 115 in cooperation with the other base stations 105. For example, the inter-station communications manager 1245 may coordinate scheduling for transmissions to the UE 115 for various interference mitigation techniques, such as beamforming or joint transmission. In some examples, the inter-station communications manager 1245 may provide an X2 interface in LTE / LTE-A wireless communications network technology to communicate between the base stations 105.

[0308] Code 1235 may include instructions for implementing aspects of the disclosure, including instructions for supporting wireless communication. 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, code 1235 may not be directly executable by processor 1240, but may (e.g., when compiled and executed) cause a computer to perform functions described herein.

[0309] FIG. 13 illustrates a flow chart illustrating a method 1300 for supporting sequence-based PUCCH transmission according to an aspect of the disclosure. The operations of the method 1300 may be implemented by the UE 115 or components thereof as described herein. For example, the operations of the method 1300 may be performed by a communications manager as described with reference to FIGS. 5-8. In some examples, the UE may execute a set of instructions to control functional elements of the UE to perform functions described herein. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the functions described herein.

[0310] At 1305, the UE may identify that the UCI payload meets a threshold size condition. The operations of 1305 may be performed according to methods described herein. In some examples, aspects of the operations of 1305 may be performed by a threshold component, as described with reference to FIGS. 5-8.

[0311] At 1310, the UE may map the UCI payload to an uplink control sequence based on the UCI payload meeting a threshold size condition. The operations of 1310 may be performed in accordance with methods described herein. In some examples, aspects of the operations of 1310 may be performed by a mapping component as described with reference to FIGS.

[0312] At 1315, the UE may transmit a PUCCH including an uplink control sequence, where the uplink control sequence represents a UCI payload. The operations of 1315 may be performed according to methods described herein. In some examples, aspects of the operations of 1315 may be performed by an uplink control sequence component as described with reference to FIGS. 5-8.

[0313] FIG. 14 illustrates a flow chart illustrating a method 1400 for supporting sequence-based PUCCH transmission according to an aspect of the disclosure. The operations of the method 1400 may be implemented by the UE 115 or components thereof as described herein. For example, the operations of the method 1400 may be performed by a communications manager as described with reference to FIGS. 5-8. In some examples, the UE may execute a set of instructions to control functional elements of the UE to perform functions described herein. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the functions described herein.

[0314] At 1405, the UE may identify that the UCI payload meets a threshold size condition. The operations of 1405 may be performed according to methods described herein. In some examples, aspects of the operations of 1405 may be performed by a threshold component, as described with reference to FIGS. 5-8.

[0315] At 1410, the UE may map the UCI payload to an uplink control sequence based on the UCI payload meeting a threshold size condition. The operations of 1410 may be performed in accordance with methods described herein. In some examples, aspects of the operations of 1410 may be performed by a mapping component as described with reference to FIGS. 5-8.

[0316] At 1415, the UE may convert the UCI payload to a decimal value. The operations of 1415 may be performed according to methods described herein. In some examples, aspects of the operations of 1415 may be performed by a decimal converter, as described with reference to FIGS.

[0317] At 1420, the UE may select an uplink control sequence from the set of uplink control sequences based on the decimal value. The operations of 1420 may be performed in accordance with methods described herein. In some examples, aspects of the operations of 1420 may be performed by a sequence selection component as described with reference to FIGS.

[0318] At 1425, the UE may transmit a PUCCH including an uplink control sequence, where the uplink control sequence represents a UCI payload. The operations of 1425 may be performed according to methods described herein. The sequence-based coding process used by the UE to transmit the PUCCH may utilize non-coherent transmission since there may be no DMRS transmitted with UCI in the PUCCH. Thus, channel estimation may not be required by the receiver. Thus, performance of the sequence-based non-coherent transmission may not rely on the quality of the channel estimation. In some examples, aspects of the operations of 1425 may be performed by an uplink control sequence component as described with reference to FIGS. 5-8.

[0319] FIG. 15 illustrates a flow chart illustrating a method 1500 for supporting sequence-based PUCCH transmission according to an aspect of the disclosure. The operations of method 1500 may be implemented by the UE 115 or components thereof as described herein. For example, the operations of method 1500 may be performed by a communications manager as described with reference to FIGS. 5-8. In some examples, the UE may execute a set of instructions to control functional elements of the UE to perform functions described herein. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the functions described herein.

[0320] At 1505, the UE may identify that the UCI payload meets a threshold size condition. The operations of 1505 may be performed according to methods described herein. In some examples, aspects of the operations of 1505 may be performed by a threshold component, as described with reference to FIGS. 5-8.

[0321] At 1510, the UE may receive a multiplexing index from the base station, where the multiplexing index is different from other multiplexing indexes provided to other UEs that are also scheduled to transmit using resources assigned to the UE for the PUCCH. The operations of 1510 may be performed according to methods described herein. In some examples, aspects of the operations of 1510 may be performed by a multiplexing component as described with reference to FIGS. 5-8.

[0322] At 1515, the UE may use the multiplexing index to map the UCI payload to the uplink control sequence. The operations of 1515 may be performed according to methods described herein. In some examples, aspects of the operations of 1515 may be performed by a multiplexing component as described with reference to FIGS. 5-8.

[0323] At 1520, the UE may map the UCI payload to the uplink control sequence based on the UCI payload meeting a threshold size condition. The operations of 1520 may be performed in accordance with methods described herein. In some examples, aspects of the operations of 1520 may be performed by a mapping component as described with reference to FIGS.

[0324] At 1525, the UE may transmit a PUCCH including an uplink control sequence, where the uplink control sequence represents a UCI payload. The operations of 1525 may be performed according to methods described herein. In some examples, aspects of the operations of 1525 may be performed by an uplink control sequence component as described with reference to FIGS. 5-8.

[0325] FIG. 16 illustrates a flow chart illustrating a method 1600 for supporting sequence-based PUCCH transmission according to an aspect of the disclosure. The operations of the method 1600 may be implemented by the base station 105 or components thereof as described herein. For example, the operations of the method 1600 may be performed by a communications manager as described with reference to FIGS. 9-12. In some examples, the base station may execute a set of instructions to control functional elements of the base station to perform functions described herein. Additionally or alternatively, the base station may use dedicated hardware to perform aspects of the functions described herein.

[0326] At 1605, the base station may identify that the UCI payload is to be transmitted by the UE as an uplink control sequence when the UCI payload meets a threshold size condition. The operations of 1605 may be performed according to methods described herein. In some examples, aspects of the operations of 1605 may be performed by a UCI identification component as described with reference to FIGS. 9-12.

[0327] At 1610, the base station may identify one or more sets of uplink control sequences from which an uplink control sequence is to be selected by a UE. The operations of 1610 may be performed in accordance with methods described herein. In some examples, aspects of the operations of 1610 may be performed by a sequence identification component as described with reference to FIGS.

[0328] At 1615, the base station may receive a PUCCH including an uplink control sequence, where the uplink control sequence represents a UCI payload. The operations of 1615 may be performed according to methods described herein. In some examples, aspects of the operations of 1615 may be performed by a PUCCH receiving component as described with reference to FIGS. 9-12.

[0329] At 1620, the base station may determine the UCI payload by associating the uplink control sequence with a corresponding sequence index of one or more sets of uplink control sequences. The operations of 1620 may be performed according to methods described herein. In some examples, aspects of the operations of 1620 may be performed by a UCI determination component as described with reference to FIGS. 9-12.

[0330] It should be noted that the methods described herein represent possible implementations, that the acts and steps may be rearranged or otherwise modified, and that other implementations are possible. Additionally, aspects from two or more of the methods may be combined.

[0331] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described by way of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used throughout much of the description, the techniques described herein may be applicable to other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the techniques described may be applicable to various other wireless communications 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, as well as other systems and radio technologies not explicitly mentioned herein.

[0332] The information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0333] The various example blocks and components described in connection with the disclosure herein may be implemented or performed using 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 alternatively, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0334] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. When implemented in software executed by a processor, the functions may be stored on or transmitted via a computer-readable medium as one or more instructions or codes. Other examples and implementations are within the scope of this 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 implementing the functions may also be physically located in various locations, including being distributed such that parts of the functions are implemented in different physical locations.

[0335] Computer-readable media includes both non-transitory computer storage media and communication media, including any medium that facilitates transfer of a computer program from one place to another. Non-transitory storage media may be any available medium that can be accessed by a general purpose or special purpose computer. By way of example and not limitation, non-transitory computer-readable media may include RAM, ROM, Electrically Erasable Programmable ROM (EEPROM), Flash memory, Compact Disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general purpose or special purpose computer or a general purpose or special purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable media. As used herein, disk and disc include CDs, laser discs, optical discs, digital versatile discs (DVDs), floppy disks, and Blu-ray discs, where disks typically reproduce data magnetically and discs reproduce data optically using lasers. Combinations of the above are also included within the scope of computer readable media.

[0336] As used herein, including in the claims, "or" as used in a list of items (e.g., a list of items ending with a phrase such as "at least one of" or "one or more of") indicates an inclusive list, such as, 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). Also, the phrase "based on" as used herein should not be construed as a reference to a closed set of conditions. For example, an exemplary 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, the phrase "based on" as used herein should be construed similarly to the phrase "based at least in part on."

[0337] In the accompanying figures, similar components or features may have the same reference label. Furthermore, various components of the same type may be distinguished by following the reference label with a dash and a second label that distinguishes the similar components. If only a first reference label is used herein, the description is applicable to any of the similar components having the same first reference label, regardless of the second reference label, or any other subsequent reference label.

[0338] The description set forth herein with respect to the accompanying drawings describes exemplary configurations and does not represent every example that may be implemented or fall within the scope of the claims. The term "example" as used herein means "serving as an example, instance, or illustration" and does not mean "preferred" or "advantageous over other examples." The detailed description includes specific details for the purposes of providing 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.

[0339] The description in this specification is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications of the present disclosure will be apparent to those skilled in the art, and the general 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 accorded the widest scope consistent with the principles and novel features disclosed herein. [Explanation of symbols]

[0340] 100 Wireless communication system 105, 105-a, 105-b base station 110 Coverage Area 115, 115-a, 115-b, 115-c UE 120 backhaul links 125 Communication Links 130 Core Network 135 Device-to-device (D2D) communication links, D2D communication links 140 Access Network Entity 145 Access Network Transmission Entity 150 Network operator IP services, operator IP services 200 Wireless Communication System 205, 205-a, 205-b Communication links 210, 210-a, 210-b PUCCH 300, 301, 302 Process Diagram 305 information bits 310 Sequence Generation Step 310-b Sequence Generation Process 320-a transform precoding or DFT 330-a PUCCH 335 UCI Payload 400 Process Flow 500 Block Diagram 505 Devices 510 Receiver 515 Communications Manager 520 Transmitter 600 Block Diagram 605 Devices 610 Receiver 615 Communications Manager 620 Threshold Component 625 Mapping Components 630 Uplink Control Sequence Components 635 Transmitter 700 Block Diagram 705 Communications Manager 710 Threshold Component 715 Mapping Components 720 Uplink Control Sequence Components 725 Decimal Converter 730 Sequence Selection Component 735 Signature Sequence Components 740 Multiplexing Component 745 Binary Converter 750 Seed Generation Components 755 Precoding Components 800 Systems 805 Devices 810 Communications Manager 815 I / O Controller 820 Transceiver 825 Antenna 830 Memory 835 Computer-readable computer-executable code, code 840 Processor 845 Bus 900 Block Diagram 905 Devices 910 Receiver 915 Communications Manager 920 Transmitter 1000 Block Diagram 1005 Devices 1010 Receiver 1015 Communications Manager 1020 UCI Identification Components 1025 Sequence Identification Component 1030 PUCCH reception component 1035 UCI Determination Component 1040 Transmitter 1100 Block Diagram 1105 Communications Manager 1110 UCI Identification Components 1115 Sequence Identification Component 1120 PUCCH reception component 1125 UCI Determination Component 1130 Signature Sequence Classifier 1135 Transmitting Antenna Indicator 1140 Multiplexing Indicator 1200 System 1205 Devices 1210 Communications Manager 1215 Network Communications Manager 1220 Transceiver 1225 Antenna 1230 Memory 1235 Computer readable code, code 1240 Processor 1245 Inter-Station Communication Manager 1250 Bus 1300 methods 1400 methods 1500 ways 1600 methods

Claims

1. 1. A method for wireless communication in a user equipment (UE), comprising: receiving a multiplexing index from a base station, the multiplexing index being different from other multiplexing indexes provided to other UEs that are also scheduled to transmit using resources assigned to the UE for a physical uplink control channel; identifying an uplink control information payload as meeting a threshold size condition; mapping the uplink control information payload to an uplink control sequence based on the uplink control information payload satisfying the threshold size condition and using the multiplexing index to map the uplink control information payload to the uplink control sequence, wherein using the multiplexing index to map the uplink control information payload to the uplink control sequence comprises selecting the uplink control sequence from a set of uplink control sequences based on the uplink control information payload and the multiplexing index; transmitting a physical uplink control channel including the uplink control sequence, the uplink control sequence representing the uplink control information payload; A method for providing the above.

2. transmitting the physical uplink control channel, transmitting the uplink control sequence as a non-coherent transmission without a demodulation reference signal; or identifying the uplink control information payload as meeting the threshold size condition, 2. The method of claim 1, comprising identifying the uplink control information payload as being less than or equal to a predetermined maximum payload size.

3. The method of claim 1 , wherein the multiplexing index is associated with a physical uplink control channel resource.

4. using the multiplexing index to map the uplink control information payload to the uplink control sequence, selecting a set of uplink control sequences from a plurality of sets of uplink control sequences based on the multiplexing index; selecting the uplink control sequence from the set of uplink control sequences; The method of claim 1 , comprising:

5. selecting the uplink control sequence from the set of uplink control sequences, converting the multiplexed index into a binary string; concatenating the binary string with the uplink control information payload to form a concatenated string; converting the concatenated string to a decimal value; selecting the uplink control sequence from the set of uplink control sequences based on the decimal value representing the concatenated string; The method of claim 1 , comprising:

6. selecting the uplink control sequence from the set of uplink control sequences, converting the uplink control information payload to a decimal value; summing a first multiple of the decimal value representing the uplink control information payload with a second multiple of the multiplexing index to form a summed decimal value; selecting the uplink control sequence from the set of uplink control sequences based on the summed decimal values; The method of claim 1 , comprising:

7. 7. The method of claim 6, wherein the first multiple is based on an amount of UEs scheduled to transmit using the resources assigned to the UE for the physical uplink control channel, the amount of UEs including the UE and the other UEs, and the second multiple is 1, or the first multiple is 1 and the second multiple is based on an amount of bits of the uplink control information payload.

8. 1. A method for wireless communication in a base station, comprising: transmitting a multiplexing index to a user equipment (UE), the multiplexing index being different from other multiplexing indexes provided to other UEs that are also scheduled to transmit using resources assigned to the UE for a physical uplink control channel; identifying an uplink control information payload to be transmitted by the UE as an uplink control sequence when the uplink control information payload meets a threshold size condition; identifying one or more sets of uplink control sequences from which the uplink control sequence is to be selected by the UE, the one or more sets of uplink control sequences from which the uplink control sequence is selected being a set of uplink control sequences among a plurality of sets of uplink control sequences, the uplink control sequence being selected from the set of uplink control sequences based on the uplink control information payload and the multiplexing index; receiving a physical uplink control channel including the uplink control sequence, the uplink control sequence representing the uplink control information payload; determining the uplink control information payload by associating the uplink control sequence with a corresponding sequence index of one or more sets of uplink control sequences; A method for providing the above.

9. receiving the physical uplink control channel, receiving the uplink control sequence as a non-coherent transmission without a demodulation reference signal; or identifying the uplink control information payload as meeting the threshold size condition, 9. The method of claim 8, comprising identifying the uplink control information payload as being less than or equal to a predetermined maximum payload size.

10. The method of claim 8, wherein the multiplexing index is associated with a physical uplink control channel resource.

11. 9. The method of claim 8, wherein the set of one or more uplink control sequences from which the uplink control sequence is selected is common to the UE and the other UEs.

12. An apparatus for wireless communication in a user equipment (UE), comprising: A processor; a memory coupled to the processor; and instructions stored in the memory, said instructions being operable when executed by the processor to cause the apparatus to perform the method of any one of claims 1 to 7.

13. An apparatus for wireless communication in a base station, comprising: A processor; a memory coupled to the processor; and instructions stored in the memory, said instructions being operable when executed by the processor to cause the apparatus to perform the method of any one of claims 8 to 11.

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