WO2020087431A1 - Conception de code hybride pour communications sans fil - Google Patents

Conception de code hybride pour communications sans fil Download PDF

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Publication number
WO2020087431A1
WO2020087431A1 PCT/CN2018/113354 CN2018113354W WO2020087431A1 WO 2020087431 A1 WO2020087431 A1 WO 2020087431A1 CN 2018113354 W CN2018113354 W CN 2018113354W WO 2020087431 A1 WO2020087431 A1 WO 2020087431A1
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WIPO (PCT)
Prior art keywords
coding scheme
block size
information bits
code rate
thresholds
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PCT/CN2018/113354
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English (en)
Inventor
Changlong Xu
Liangming WU
Jian Li
Jing Jiang
Hao Xu
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Qualcomm Incorporated
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Publication date
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Priority to PCT/CN2018/113354 priority Critical patent/WO2020087431A1/fr
Publication of WO2020087431A1 publication Critical patent/WO2020087431A1/fr

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/35—Unequal or adaptive error protection, e.g. by providing a different level of protection according to significance of source information or by adapting the coding according to the change of transmission channel characteristics
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/65—Purpose and implementation aspects
    • H03M13/6508—Flexibility, adaptability, parametrability and configurability of the implementation
    • H03M13/6513—Support of multiple code types, e.g. unified decoder for LDPC and turbo codes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/65—Purpose and implementation aspects
    • H03M13/6508—Flexibility, adaptability, parametrability and configurability of the implementation
    • H03M13/6516—Support of multiple code parameters, e.g. generalized Reed-Solomon decoder for a variety of generator polynomials or Galois fields
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0041—Arrangements at the transmitter end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
    • H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
    • H03M13/11—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits using multiple parity bits
    • H03M13/1102—Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
    • H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
    • H03M13/13—Linear codes

Definitions

  • the following relates generally to wireless communications, and more specifically to hybrid coding design for low latency communications.
  • Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power) .
  • Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-APro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems.
  • 4G systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-APro systems
  • 5G systems which may be referred to as New Radio (NR) systems.
  • a wireless multiple-access communications system may include a number of base stations or network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE) .
  • UE user equipment
  • a UE or base station may encode information utilizing different coding schemes. Coding schemes may be associated with varying signal-to-noise ratios (SNRs) , some of which may not be sufficiently robust for all communication environments or communication types.
  • SNRs signal-to-noise ratios
  • the described techniques relate to improved methods, systems, devices, and apparatuses that support hybrid coding design for low latency communications.
  • a wireless device e.g., a user equipment (UE) , a base station
  • encode or decode information e.g., a set of information bits
  • a code rate and/or a block size e.g., a transport block size, a code block size, a payload size
  • the wireless device may, for instance, choose a coding scheme type (e.g., polar coding, low-density parity-check (LDPC) coding) based on the code rate and/or the block size and may encode the information according to the coding scheme.
  • a coding scheme type e.g., polar coding, low-density parity-check (LDPC) coding
  • Choosing the coding scheme type may involve comparing a code rate and a block size associated with information (e.g., the information to be encoded or decoded) with one or more threshold code rates or block sizes.
  • the wireless device may transmit the information (e.g., to another wireless device) .
  • the other wireless device may receive the encoded information and choose a coding scheme type (e.g., based on a code rate and a block size associated with the encoded information) for decoding.
  • a method of wireless communications at a first wireless device in a wireless communications system may include identifying a code rate and a block size associated with a set of information bits for transmission to a second wireless device in the wireless communications system, determining a coding scheme type of a set of coding scheme types for encoding the set of information bits based on the code rate and the block size, encoding the set of information bits based on the coding scheme type, and transmitting the encoded set of information bits to the second wireless device.
  • the apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory.
  • the instructions may be executable by the processor to cause the apparatus to identify a code rate and a block size associated with a set of information bits for transmission to a second wireless device in the wireless communications system, determine a coding scheme type of a set of coding scheme types for encoding the set of information bits based on the code rate and the block size, encode the set of information bits based on the coding scheme type, and transmit the encoded set of information bits to the second wireless device.
  • the apparatus may include means for identifying a code rate and a block size associated with a set of information bits for transmission to a second wireless device in the wireless communications system, determining a coding scheme type of a set of coding scheme types for encoding the set of information bits based on the code rate and the block size, encoding the set of information bits based on the coding scheme type, and transmitting the encoded set of information bits to the second wireless device.
  • a non-transitory computer-readable medium storing code for wireless communications at a first wireless device in a wireless communications system is described.
  • the code may include instructions executable by a processor to identify a code rate and a block size associated with a set of information bits for transmission to a second wireless device in the wireless communications system, determine a coding scheme type of a set of coding scheme types for encoding the set of information bits based on the code rate and the block size, encode the set of information bits based on the coding scheme type, and transmit the encoded set of information bits to the second wireless device.
  • a channel type associated with transmission of the set of information bits is one of a control channel or a data channel
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining the coding scheme type for encoding the set of information bits independent of the channel type.
  • the determining the coding scheme type may include operations, features, means, or instructions for comparing the code rate to a set of code rate thresholds and the block size to a set of block size thresholds.
  • At least one of the set of code rate thresholds or the set of block size thresholds includes a set of thresholds.
  • different coding scheme types may be selected based on whether the code rate satisfies a code rate threshold of the set of code rate thresholds.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining a second set of code rate thresholds and a second set of block size thresholds for data, where the set of code rate thresholds and the set of block size thresholds are for control information.
  • the set of code rate thresholds may be the same as the second set of code rate thresholds
  • the set of block size thresholds may be the same as the second set of block size thresholds
  • the set of information bits is associated with a communication direction, the communication direction corresponding to one of an uplink communication or a downlink communication.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining the coding scheme type for encoding the set of information bits may be based on the communication direction.
  • the set of coding scheme types includes a polar coding scheme and an LDPC coding scheme.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving a negative acknowledgement (NACK) message from the second wireless device in response to transmission of the encoded set of information bits, determining a second block size for a second transmission associated with the set of information bits, and transmitting the second transmission, the second transmission including code bits encoded according to the coding scheme type.
  • NACK negative acknowledgement
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining the block size based on a payload size associated with the set of information bits.
  • a method of wireless communications at a first wireless device in a wireless communications system may include receiving a transmission of an encoded set of information bits from a second wireless device in the wireless communications system, identifying a code rate and a block size associated with the encoded set of information bits, determining a coding scheme type of a set of coding scheme types for decoding the encoded set of information bits based on the code rate and the block size, and decoding the encoded set of information bits based on the coding scheme type.
  • the apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory.
  • the instructions may be executable by the processor to cause the apparatus to receive a transmission of an encoded set of information bits from a second wireless device in the wireless communications system, identify a code rate and a block size associated with the encoded set of information bits, determine a coding scheme type of a set of coding scheme types for decoding the encoded set of information bits based on the code rate and the block size, and decode the encoded set of information bits based on the coding scheme type.
  • the apparatus may include means for receiving a transmission of an encoded set of information bits from a second wireless device in the wireless communications system, identifying a code rate and a block size associated with the encoded set of information bits, determining a coding scheme type of a set of coding scheme types for decoding the encoded set of information bits based on the code rate and the block size, and decoding the encoded set of information bits based on the coding scheme type.
  • a non-transitory computer-readable medium storing code for wireless communications at a first wireless device in a wireless communications system is described.
  • the code may include instructions executable by a processor to receive a transmission of an encoded set of information bits from a second wireless device in the wireless communications system, identify a code rate and a block size associated with the encoded set of information bits, determine a coding scheme type of a set of coding scheme types for decoding the encoded set of information bits based on the code rate and the block size, and decode the encoded set of information bits based on the coding scheme type.
  • a channel type associated with the transmission of the encoded set of information bits is one of a control channel or a data channel.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining the coding scheme type for decoding the encoded set of information bits independent of the channel type.
  • the determining the coding scheme type may include operations, features, means, or instructions for comparing the code rate to a set of code rate thresholds and the block size to a set of block size thresholds.
  • At least one of the set of code rate thresholds or the set of block size thresholds includes a set of thresholds.
  • different coding scheme types may be selected based on whether the code rate satisfies a code rate threshold of the set of code rate thresholds.
  • the set of code rate thresholds and the set of block size thresholds are for control information.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining a second set of code rate thresholds and a second set of block size thresholds for data.
  • the set of code rate thresholds may be the same as the second set of code rate thresholds
  • the set of block size thresholds may be the same as the second set of block size thresholds
  • the encoded set of information bits is associated with a communication direction, the communication direction corresponding to one of an uplink communication or a downlink communication.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining the coding scheme type for decoding the encoded set of information bits may be based on the communication direction.
  • the set of coding scheme types includes a polar coding scheme and an LDPC coding scheme.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting a NACK message to the first wireless device based on decoding the encoded set of information bits, receiving a second transmission from the first wireless device, the second transmission including code bits encoded according to the coding scheme type, and decoding the second transmission based on the coding scheme type and a second block size for the second transmission.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining the block size based on a payload size associated with the encoded set of information bits.
  • FIG. 1 illustrates an example of a wireless communications system in accordance with aspects of the present disclosure.
  • FIG. 2 illustrates an example of a wireless communications system in accordance with aspects of the present disclosure.
  • FIGs. 3A and 3B illustrate examples of code decision distributions in accordance with aspects of the present disclosure.
  • FIG. 4 illustrates an example of a process flow in accordance with aspects of the present disclosure.
  • FIGs. 5 and 6 show block diagrams of devices in accordance with aspects of the present disclosure.
  • FIG. 7 shows a block diagram of a communications manager in accordance with aspects of the present disclosure.
  • FIG. 8 shows a diagram of a system including a user equipment (UE) in accordance with aspects of the present disclosure.
  • FIG. 9 shows a diagram of a system including a base station in accordance with aspects of the present disclosure.
  • FIGs. 10 through 13 show flowcharts illustrating methods in accordance with aspects of the present disclosure.
  • a wireless device may transmit information to another wireless device in a communications system.
  • the information may be carried by a channel, such as an uplink, downlink, or sidelink channel.
  • the base station or UE transmitting the information may encode the information using a coding scheme, which may involve the use of error correcting codes (ECCs) .
  • ECCs may be used to control errors in data over unreliable or noisy channels.
  • Some types of ECCs include polar codes and low-density parity-check (LDPC) codes.
  • LDPC low-density parity-check
  • An LDPC code may be a type of linear ECC utilizing a sparse divided (bipartite) graph.
  • LDPC coding may utilize one or more base graphs (e.g., a base graph 1 (BG1) or a base graph 2 (BG2) ) .
  • encoded information may be associated with a code rate (e.g., a proportion of information to be transmitted that is non-redundant) and a payload size (e.g., an amount of information to be transmitted) or block size (e.g., total number of transmitted bits) .
  • a code rate e.g., a proportion of information to be transmitted that is non-redundant
  • a payload size e.g., an amount of information to be transmitted
  • block size e.g., total number of transmitted bits
  • SNRs associated with successfully decoding the encoded information may be lower when the information is encoded with LDPC coding than with polar coding.
  • a wireless device that determines a coding scheme according to a code rate and payload size associated with the information to be encoded may enable the encoded information to be decoded to achieve higher SNRs.
  • Techniques describe herein may involve comparing a code rate and a payload size to one or more code rate and payload size thresholds.
  • Such thresholds may define a boundary between information that is to be encoded using different coding scheme types (e.g., polar coding, an LDPC coding scheme) . Comparing the code rate and the payload size associated with information to be encoded against these thresholds may be used to determine which type of coding scheme to use to encode the information.
  • the encoded information may be utilized in ultra-reliable low-latency communications (URLLC) , which may for instance, be associated with a latency no more than 0.5 milliseconds (ms) , for example.
  • URLLC may be associated with an error-floor-free block error rate (BLER) as low as 10 -5 with or without hybrid automatic repeat request (HARQ) support over a 1 ms period.
  • BLER error-floor-free block error rate
  • HARQ hybrid automatic repeat request
  • Encoding information based on code rate and payload size may enable the encoded information to be received at a sufficiently high SNR (e.g., the encoded information may be received at an SNR above a minimum threshold) .
  • aspects of the disclosure are initially described in the context of wireless communications systems. Code decision distributions and a process flow are also provided to illustrate additional aspects of the disclosure. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to hybrid coding design for low latency communications.
  • FIG. 1 illustrates an example of a wireless communications system 100 in accordance with aspects of the present disclosure.
  • the wireless communications system 100 includes base stations 105, UEs 115, and a core network 130.
  • the wireless communications system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-APro network, or a New Radio (NR) network.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • LTE-APro LTE-APro
  • NR New Radio
  • wireless communications system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, or communications with low-cost and low-complexity devices.
  • ultra-reliable e.g., mission critical
  • Base stations 105 may wirelessly communicate with UEs 115 via one or more base station antennas.
  • Base stations 105 described herein may include or may be referred to by those skilled in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB) , a next-generation NodeB or giga-NodeB (either of which may be referred to as a gNB) , a Home NodeB, a Home eNodeB, or some other suitable terminology.
  • Wireless communications system 100 may include base stations 105 of different types (e.g., macro or small cell base stations) .
  • the UEs 115 described herein may be able to communicate with various types of base stations 105 and network equipment including macro eNBs, small cell eNBs, gNBs, relay base stations, and the like.
  • Each base station 105 may be associated with a particular geographic coverage area 110 in which communications with various UEs 115 is supported. Each base station 105 may provide communication coverage for a respective geographic coverage area 110 via communication links 125, and communication links 125 between a base station 105 and a UE 115 may utilize one or more carriers. Communication links 125 shown in wireless communications system 100 may include uplink transmissions from a UE 115 to a base station 105, or downlink transmissions from a base station 105 to a UE 115. Downlink transmissions may also be called forward link transmissions while uplink transmissions may also be called reverse link transmissions.
  • the geographic coverage area 110 for a base station 105 may be divided into sectors making up only a portion of the geographic coverage area 110, and each sector may be associated with a cell.
  • each base station 105 may provide communication coverage for a macro cell, a small cell, a hot spot, or other types of cells, or various combinations thereof.
  • a base station 105 may be movable and therefore provide communication coverage for a moving geographic coverage area 110.
  • different geographic coverage areas 110 associated with different technologies may overlap, and overlapping geographic coverage areas 110 associated with different technologies may be supported by the same base station 105 or by different base stations 105.
  • the wireless communications system 100 may include, for example, a heterogeneous LTE/LTE-A/LTE-APro or NR network in which different types of base stations 105 provide coverage for various geographic coverage areas 110.
  • the term “cell” refers to a logical communication entity used for communication with a base station 105 (e.g., over a carrier) , and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID) , a virtual cell identifier (VCID) ) operating via the same or a different carrier.
  • a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., machine-type communication (MTC) , narrowband Internet-of-Things (NB-IoT) , enhanced mobile broadband (eMBB) , or others) that may provide access for different types of devices.
  • MTC machine-type communication
  • NB-IoT narrowband Internet-of-Things
  • eMBB enhanced mobile broadband
  • the term “cell” may refer to a portion of a geographic coverage area 110 (e.g., a sector) over which the logical entity operates.
  • UEs 115 may be dispersed throughout the wireless communications system 100, and each UE 115 may be stationary or mobile.
  • a UE 115 may also 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 the “device” may also be referred to as a unit, a station, a terminal, or a client.
  • a UE 115 may also be a personal electronic device such as a cellular phone, a personal digital assistant (PDA) , a tablet computer, a laptop computer, or a personal computer.
  • PDA personal digital assistant
  • a UE 115 may also refer to a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or an MTC device, or the like, which may be implemented in various articles such as appliances, vehicles, meters, or the like.
  • WLL wireless local loop
  • IoT Internet of Things
  • IoE Internet of Everything
  • MTC massive machine type communications
  • Some UEs 115 may be low cost or low complexity devices, and may provide for 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 one another or a base station 105 without human intervention.
  • M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay that information to a central server or application program that can make use of the information or present the information to humans interacting with the program or application.
  • Some UEs 115 may be designed to collect information or enable automated behavior of machines. 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 charging.
  • Some UEs 115 may be configured to employ operating modes that reduce power consumption, such as half-duplex communications (e.g., a mode that supports one-way communication via transmission or reception, but not transmission and reception simultaneously) . In some examples half-duplex communications may be performed at a reduced peak rate. Other power conservation techniques for UEs 115 include entering a power saving “deep sleep” mode when not engaging in active communications, or operating over a limited bandwidth (e.g., according to narrowband communications) . In some cases, UEs 115 may be designed to support critical functions (e.g., mission critical functions) , and a wireless communications system 100 may be configured to provide ultra-reliable communications for these functions.
  • critical functions e.g., mission critical functions
  • a UE 115 may also be able to communicate directly with other UEs 115 (e.g., using a peer-to-peer (P2P) or device-to-device (D2D) protocol) .
  • P2P peer-to-peer
  • D2D device-to-device
  • One or more of a group of UEs 115 utilizing D2D communications may be within the geographic coverage area 110 of a base station 105.
  • Other UEs 115 in such a group may be outside the geographic coverage area 110 of a base station 105, or be otherwise unable to receive transmissions from a base station 105.
  • groups of UEs 115 communicating via D2D communications may utilize a one-to-many (1 ⁇ M) system in which each UE 115 transmits to every other UE 115 in the group.
  • a base station 105 facilitates the scheduling of resources for D2D communications.
  • D2D communications are carried out between UEs 115 without the involvement of a base
  • Base stations 105 may communicate with the core network 130 and with one another.
  • base stations 105 may interface with the core network 130 through backhaul links 132 (e.g., via an S1, N2, N3, or other interface) .
  • Base stations 105 may communicate with one another over backhaul links 134 (e.g., via an X2, Xn, or other interface) either directly (e.g., directly between base stations 105) or indirectly (e.g., via core network 130) .
  • 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) , which may include at least one mobility management entity (MME) , at least one serving gateway (S-GW) , and at least one Packet Data Network (PDN) gateway (P-GW) .
  • the MME may manage non-access stratum (e.g., control plane) functions such as mobility, authentication, and bearer management for UEs 115 served by base stations 105 associated with the EPC.
  • User IP packets may be transferred through the S-GW, which itself may be connected to the P-GW.
  • the P-GW may provide IP address allocation as well as other functions.
  • the P-GW may be connected to the network operators IP services.
  • the operators IP services may include access to the Internet, Intranet (s) , an IP Multimedia Subsystem (IMS) , or a Packet-Switched (PS) Stream
  • At least some of the network devices may include subcomponents such as an access network entity, which may be an example of an access node controller (ANC) .
  • Each access network entity may communicate with UEs 115 through a number of other access network transmission entities, which may be referred to as a radio head, a smart radio head, or a transmission/reception point (TRP) .
  • TRP transmission/reception point
  • various functions of each access network entity or base station 105 may be distributed across various network devices (e.g., radio heads and access network controllers) or consolidated into a single network device (e.g., a base station 105) .
  • Wireless communications system 100 may operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz) .
  • the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band, since the wavelengths range from approximately one decimeter to one meter in length.
  • UHF waves may be blocked or redirected by buildings and environmental features. However, the waves may penetrate structures sufficiently for a macro cell to provide service to UEs 115 located indoors. Transmission of UHF waves may be associated with smaller antennas and shorter range (e.g., less than 100 km) compared to transmission using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.
  • HF high frequency
  • VHF very high frequency
  • Wireless communications system 100 may also operate in a super high frequency (SHF) region using frequency bands from 3 GHz to 30 GHz, also known as the centimeter band.
  • SHF region includes bands such as the 5 GHz industrial, scientific, and medical (ISM) bands, which may be used opportunistically by devices that may be capable of tolerating interference from other users.
  • ISM bands 5 GHz industrial, scientific, and medical bands
  • Wireless communications system 100 may also operate in an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) , also known as the millimeter band.
  • EHF extremely high frequency
  • wireless communications system 100 may support millimeter wave (mmW) communications between UEs 115 and base stations 105, and EHF antennas of the respective devices may be even smaller and more closely spaced than UHF antennas. In some cases, this may facilitate use of antenna arrays within a UE 115.
  • mmW millimeter wave
  • the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and shorter range than SHF or UHF transmissions. Techniques disclosed herein may be employed across transmissions that use one or more different frequency regions, and designated use of bands across these frequency regions may differ by country or regulating body.
  • wireless communications system 100 may utilize both licensed and unlicensed radio frequency spectrum bands.
  • wireless communications 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 ISM band.
  • LAA License Assisted Access
  • LTE-U LTE-Unlicensed
  • NR NR technology
  • an unlicensed band such as the 5 GHz ISM band.
  • wireless devices such as base stations 105 and UEs 115 may employ listen-before-talk (LBT) procedures to ensure a frequency channel is clear before transmitting data.
  • LBT listen-before-talk
  • operations in unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating in a licensed band (e.g., LAA) .
  • Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, peer-to-peer transmissions, or a combination of these.
  • Duplexing in unlicensed spectrum may be based on frequency division duplexing (FDD) , time division duplexing (TDD) , or a combination of both.
  • FDD frequency division duplexing
  • TDD time division duplexing
  • 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.
  • wireless communications system 100 may use a transmission scheme between a transmitting device (e.g., a base station 105) and a receiving device (e.g., a UE 115) , where the transmitting device is equipped with multiple antennas and the receiving device is equipped with one or more antennas.
  • MIMO communications may employ multipath signal propagation to increase the spectral efficiency by transmitting or receiving multiple signals via different spatial layers, which may be referred to as spatial multiplexing.
  • the multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Likewise, the multiple signals may be received by the 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.
  • Different spatial layers may be associated with different antenna ports used for channel measurement and reporting.
  • MIMO techniques include single-user MIMO (SU-MIMO) where multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO) where multiple spatial layers are transmitted to multiple devices.
  • SU-MIMO single-user MIMO
  • MU-MIMO multiple-user MIMO
  • Beamforming which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a base station 105 or a UE 115) to shape or steer an antenna beam (e.g., a transmit beam or receive beam) along a spatial path between the transmitting device and the receiving device.
  • Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that signals propagating at particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference.
  • the adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying certain amplitude and phase offsets to signals carried via each of the antenna elements associated with the device.
  • the adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation) .
  • a base station 105 may use multiple antennas or antenna arrays to conduct beamforming operations for directional communications with a UE 115. For instance, some signals (e.g. synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted by a base station 105 multiple times in different directions, which may include a signal being transmitted according to different beamforming weight sets associated with different directions of transmission. Transmissions in different beam directions may be used to identify (e.g., by the base station 105 or a receiving device, such as a UE 115) a beam direction for subsequent transmission and/or reception by the base station 105.
  • some signals e.g. synchronization signals, reference signals, beam selection signals, or other control signals
  • Transmissions in different beam directions may be used to identify (e.g., by the base station 105 or a receiving device, such as a UE 115) a beam direction for subsequent transmission and/or reception by the base station 105.
  • Some signals may be transmitted by a base station 105 in a single beam direction (e.g., a direction associated with the receiving device, such as a UE 115) .
  • the beam direction associated with transmissions along a single beam direction may be determined based at least in in part on a signal that was transmitted in different beam directions.
  • a UE 115 may receive one or more of the signals transmitted by the base station 105 in different directions, and the UE 115 may report to the base station 105 an indication of the signal it received with a highest signal quality, or an otherwise acceptable signal quality.
  • a UE 115 may employ similar techniques for transmitting signals multiple times in different directions (e.g., for identifying a beam direction for subsequent transmission or reception by the UE 115) , or transmitting a signal in a single direction (e.g., for transmitting data to a receiving device) .
  • a receiving device may try multiple receive beams when receiving various signals from the base station 105, such as synchronization signals, reference signals, beam selection signals, or other control signals.
  • a receiving device may try multiple receive 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 applied to signals received at a plurality of antenna elements of an antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at a plurality of antenna elements of an antenna array, any of which may be referred to as “listening” according to different receive beams or receive directions.
  • a receiving device may use a single receive beam to receive along a single beam direction (e.g., when receiving a data signal) .
  • the single receive beam may be aligned in a beam direction determined based on listening according to different receive beam directions (e.g., a beam direction determined to have a highest signal strength, highest signal-to-noise ratio, or otherwise acceptable signal quality based on listening according to multiple beam directions) .
  • the antennas of a base station 105 or UE 115 may be located within one or more antenna arrays, which may support MIMO operations, or transmit or receive beamforming.
  • one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower.
  • antennas or antenna arrays associated with a base station 105 may be located in diverse geographic locations.
  • a base station 105 may have an antenna array with a number of rows and columns of antenna ports that the base station 105 may use to support beamforming of communications with a UE 115.
  • a UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations.
  • wireless communications system 100 may be a packet-based network that operate according to a layered protocol stack.
  • PDCP Packet Data Convergence Protocol
  • a Radio Link Control (RLC) layer may perform packet segmentation and reassembly to communicate over logical channels.
  • RLC Radio Link Control
  • a Medium Access Control (MAC) layer may perform priority handling and multiplexing of logical channels into transport channels.
  • the MAC layer may also use HARQ to provide retransmission at the MAC layer to improve link efficiency.
  • the Radio Resource Control (RRC) protocol layer may provide establishment, configuration, and maintenance of an RRC connection between a UE 115 and a base station 105 or core network 130 supporting radio bearers for user plane data.
  • RRC Radio Resource Control
  • transport channels may be mapped to physical channels.
  • UEs 115 and base stations 105 may support retransmissions of data to increase the likelihood that data is received successfully.
  • HARQ feedback is one technique of increasing the likelihood that data is received correctly over a 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) ) .
  • FEC forward error correction
  • ARQ automatic repeat request
  • HARQ may improve throughput at the MAC layer in poor radio conditions (e.g., signal-to-noise conditions) .
  • a wireless device may support same-slot HARQ feedback, where the device may provide HARQ feedback in a specific slot for data received in a previous symbol in the slot. In other cases, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval.
  • the radio frames may be identified by a system frame number (SFN) ranging from 0 to 1023.
  • SFN system frame number
  • Each frame may include 10 subframes numbered from 0 to 9, and each subframe may have a duration of 1 ms.
  • a subframe may be further divided into 2 slots each having a duration of 0.5 ms, and each slot may contain 6 or 7 modulation symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period) . Excluding the cyclic prefix, each symbol period may contain 2048 sampling periods.
  • a subframe may be the smallest scheduling unit of the wireless communications system 100, and may be referred to as a transmission time interval (TTI) .
  • TTI transmission time interval
  • a smallest scheduling unit of the wireless communications system 100 may be shorter than a subframe or may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs) or in selected component carriers using sTTIs) .
  • a slot may further be divided into multiple mini-slots containing one or more symbols.
  • a symbol of a mini-slot or a mini-slot may be the smallest unit of scheduling.
  • Each symbol may vary in duration depending on the subcarrier spacing or frequency band of operation, for example.
  • some wireless communications systems may implement slot aggregation in which multiple slots or mini-slots are aggregated together and used for communication between a UE 115 and a base station 105.
  • carrier refers to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communications over a communication link 125.
  • a carrier of a communication link 125 may include a portion of a radio frequency spectrum band that is operated according to physical layer channels for a given radio access technology.
  • Each physical layer channel may carry user data, control information, or other signaling.
  • a carrier may be associated with a pre-defined frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN) ) , and may be positioned according to a channel raster for discovery by UEs 115.
  • E-UTRA evolved universal mobile telecommunication system terrestrial radio access
  • E-UTRA absolute radio frequency channel number
  • Carriers may be downlink or uplink (e.g., in an FDD mode) , or be configured to carry downlink and uplink communications (e.g., in a TDD mode) .
  • signal waveforms transmitted over a carrier may be made up of multiple sub-carriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM) ) .
  • MCM multi-carrier modulation
  • OFDM orthogonal frequency division multiplexing
  • DFT-S-OFDM discrete Fourier transform spread OFDM
  • the organizational structure of the carriers may be different for different radio access technologies (e.g., LTE, LTE-A, LTE-APro, NR) .
  • communications over a carrier may be organized according to TTIs or slots, each of which may include user data as well as control information or signaling to support decoding the user data.
  • a carrier may also include dedicated acquisition signaling (e.g., synchronization signals or system information) and control signaling that coordinates operation for the carrier.
  • acquisition signaling e.g., synchronization signals or system information
  • control signaling that coordinates operation for the carrier.
  • a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers.
  • Physical channels may be multiplexed on a carrier according to various techniques.
  • a physical control channel and a physical data channel may be multiplexed on a downlink carrier, for example, using time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques.
  • control information transmitted in a physical control channel may be distributed between different control regions in a cascaded manner (e.g., between a common control region or common search space and one or more UE-specific control regions or UE-specific search spaces) .
  • 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 a “system bandwidth” of the carrier or the wireless communications system 100.
  • the carrier bandwidth may be one of a number of predetermined bandwidths for carriers of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz) .
  • each served UE 115 may be configured for operating over portions or all of the carrier bandwidth.
  • some UEs 115 may be configured for operation using a narrowband protocol type that is associated with a predefined portion or range (e.g., set of subcarriers or RBs) within a carrier (e.g., “in-band” deployment of a narrowband protocol type) .
  • a narrowband protocol type that is associated with a predefined portion or range (e.g., set of subcarriers or RBs) within a carrier (e.g., “in-band” deployment of a narrowband protocol type) .
  • a resource element may consist of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, where the symbol period and 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 more resource elements that a UE 115 receives and the higher the order of the modulation scheme the higher the data rate may be for the UE 115.
  • a wireless communications resource may refer to a combination of a radio frequency spectrum resource, a time resource, and a spatial resource (e.g., spatial layers) , and the use of multiple spatial layers may further increase the data rate for communications with a UE 115.
  • a spatial resource e.g., spatial layers
  • Devices of the wireless communications system 100 may have a hardware configuration that supports communications over a particular carrier bandwidth, or may be configurable to support communications over one of a set of carrier bandwidths.
  • the wireless communications system 100 may include base stations 105 and/or UEs 115 that support simultaneous communications via carriers associated with more than one different carrier bandwidth.
  • Wireless communications system 100 may support communication with a UE 115 on multiple cells or carriers, a feature which may be referred to as carrier aggregation or multi-carrier operation.
  • a 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 FDD and TDD component carriers.
  • wireless communications system 100 may utilize enhanced component carriers (eCCs) .
  • eCC may be characterized by one or more features including wider carrier or frequency channel bandwidth, shorter symbol duration, shorter TTI duration, or modified control channel configuration.
  • an eCC may be associated with a carrier aggregation configuration or a dual connectivity configuration (e.g., when multiple serving cells have a suboptimal or non-ideal backhaul link) .
  • An eCC may also be configured for use in unlicensed spectrum or shared spectrum (e.g., where more than one operator is allowed to use the spectrum) .
  • An eCC characterized by wide carrier bandwidth may include one or more segments that may be utilized by UEs 115 that are not capable of monitoring the whole carrier bandwidth or are otherwise configured to use a limited carrier bandwidth (e.g., to conserve power) .
  • an eCC may utilize a different symbol duration than other component carriers, which may include use of a reduced symbol duration as compared with symbol durations of the other component carriers.
  • a shorter symbol duration may be associated with increased spacing between adjacent subcarriers.
  • a device such as a UE 115 or base station 105, utilizing eCCs may transmit wideband signals (e.g., according to frequency channel or carrier bandwidths of 20, 40, 60, 80 MHz) at reduced symbol durations (e.g., 16.67 microseconds) .
  • a TTI in eCC may consist of one or multiple symbol periods. In some cases, the TTI duration (that is, the number of symbol periods in a TTI) may be variable.
  • Wireless communications system 100 may be an NR system that may utilize any combination of licensed, shared, and unlicensed spectrum bands, among others.
  • the flexibility of eCC symbol duration and subcarrier spacing may allow for the use of eCC across multiple spectrums.
  • NR shared spectrum may increase spectrum utilization and spectral efficiency, specifically through dynamic vertical (e.g., across the frequency domain) and horizontal (e.g., across the time domain) sharing of resources.
  • Wireless communications system 100 may support efficient techniques for hybrid coding in low latency communications.
  • a wireless device e.g., a UE 115 or a base station 105
  • the wireless device may determine a coding scheme type (e.g., polar coding or LDPC coding) based on the code rate and the payload or block size. Once the coding scheme type has been determined, the wireless device may encode the information with the chosen coding scheme and may transmit the encoded information to the second wireless device.
  • a coding scheme type e.g., polar coding or LDPC coding
  • FIG. 2 illustrates an example of a wireless communications system 200 in accordance with one or more aspects of the present disclosure.
  • wireless communications system 200 may implement aspects of wireless communications system 100.
  • Wireless communications system 200 may include UE 115-a and base station 105-a, which may be examples of a UE 115 and a base station 105, as described with reference to FIG. 1.
  • UE 115-a and base station 105-a may communicate with each other via communication link 205.
  • wireless communications system 200 may support operations where a UE 115 communicates with another UE 115 (e.g., via sidelink communications) or where a base station 105 communicates with another base station 105 (e.g., via an Xn or X2 interface) .
  • Communication link 205 may carry uplink and downlink transmissions. For instance, transmissions from base station 105-a to UE 115-a may be carried via one or more downlink channels (e.g., a physical downlink control channel (PDCCH) , a physical downlink shared channel (PDSCH) ) and may be considered downlink transmissions. Transmissions from UE 115-a to base station 105-a may be carried via one or more uplink channels (e.g., a physical uplink control channel (PUCCH) , a physical uplink shared channel (PUSCH) ) and may be considered uplink transmissions.
  • downlink channels e.g., a physical downlink control channel (PDCCH) , a physical downlink shared channel (PUSCH)
  • uplink channels e.g., a physical uplink control channel (PUCCH) , a physical uplink shared channel (PUSCH)
  • the type of ECC that UE 115-a and/or base station 105-aapplies may depend on a code rate (e.g., a proportion of information to be transmitted that is non-redundant) and a payload size (e.g., an amount of information to be transmitted) .
  • (i+j) M+1 ⁇ .
  • UE 115-a and/or base station 105-a may utilize LDPC codes for a code rate R X and a payload size K Y if R X >R k or K Y >K l for every pair of (R k , K l ) in P.
  • f (i, j) ⁇ g (M, N) ⁇ , P ⁇ (R i , K j )
  • f (i, j) >g (M, N) ⁇ , P ⁇ (R i , K j )
  • f (i, j) ⁇ g( M, N) ⁇ , P ⁇ (R i , K j )
  • Other examples of code rates, code rate ranges, payload sizes, and payload size ranges may be considered without departing from the scope of the present disclosure.
  • UE 115-a and/or base station 105-a may determine the type of encoding based on the type of channel over which the information is to be transmitted. For instance, if base station 105-adecides to transmit information over a PDCCH, base station 105-a may determine to encode the information with polar coding. Such a determination may be made without considering the payload size and the code rate (e.g., because a maximum payload size associated with PDCCH may be below the lowest payload size threshold, K 1 ) . Such a determination may also be made for other channels (e.g., PUCCH, PDSCH, and PUSCH) whose maximum payload size is below the lowest payload size threshold, K 1 .
  • other channels e.g., PUCCH, PDSCH, and PUSCH
  • UE 115-a and/or base station 105-a may consider payload size and code rate when determining the type of encoding. In some cases, UE 115-a and/or base station 105-a may consider payload size and/or code rate to determine encoding information for one or more of PUCCH, PDSCH, and PUSCH. In other cases, UE 115-a and base station 105-a may consider payload size and/or code rate to determine encoding information regardless of channel type (e.g., the same code rate and/or payload size thresholds may be applied across different channel types) .
  • channel type e.g., the same code rate and/or payload size thresholds may be applied across different channel types
  • encoded information received by base station 105-a may not be properly decoded (e.g., due to interference or noise) .
  • the receiving device e.g., base station 105-a or UE 115-a
  • may transmit a negative acknowledgement (NACK) to the transmitting device e.g., UE 115-a or base station 105-a, respectively.
  • NACK negative acknowledgement
  • base station 105-a and/or UE 115-a may adjust the code rate and/or payload size and determine whether to use the same or a different type of encoding based on the new code rate and/or payload size values.
  • Base station 105-a or UE 115-a may compare the updated code rate and/or payload size values with the thresholds described herein and may encode the information for transmission or retransmission based on the determined coding scheme type.
  • switching between polar coding and LDPC coding may benefit performance characteristics for various payload sizes. For instance, smaller payload sizes (e.g., payload sizes less than 400 bits) that have been encoded with polar coding may be received and decoded with a lower SNR than the same information encoded with LDPC coding. Meanwhile, larger payload sizes (e.g., payload sizes more than 400 bits, which may include uplink control information (UCI) ) and/or information associated with a higher code rate may, upon being encoded with LDPC coding, be received and decoded at a lower SNR than the same information encoded with polar coding. As such, utilizing both polar coding and LDPC coding in conjunction for separate code rate and payload size values may allow reception and decoding of information at a lower SNR.
  • UCI uplink control information
  • a receiving device may receive encoded information (e.g., an encoded set of information bits) from a transmitting device.
  • encoded information e.g., an encoded set of information bits
  • the receiving device may determine a decoding scheme type (e.g., a polar coding scheme or an LDPC coding scheme) to use for decoding the encoded information.
  • the receiving device may compare the code rate and/or the payload or block size to respective code rate and payload or block size thresholds to determine whether to use a given coding scheme.
  • Other encoding or decoding schemes may be utilized without departing from the scope of the present disclosure.
  • FIG. 3A illustrates a code decision distribution 300 in accordance with aspects of the present disclosure.
  • code decision distribution 300 may be implemented by components of wireless communications systems 100 and 200 (e.g., a UE 115 or a base station 105) .
  • Code decision distribution 300 may include a polar region 305-a and a LDPC region 310-a, which may correspond to encoding with polar coding and LDPC coding (e.g., BG1 or BG2) , respectively.
  • Code decision distribution 300 may represent a decision made by a wireless device (e.g., a UE 115 or a base station 105) on how to encode information. For instance, the wireless device may determine a particular code rate and a particular payload size associated with information to be encoded and may determine whether to encode the information using a polar code or a LDPC code based on whether the values are with polar region 305-a or LDPC region 310-a. Such a decision may be determined based on code rate and payload size thresholds.
  • the wireless device may encode the information via LDPC coding.
  • the wireless device may encode the information via LDPC coding.
  • the wireless device may encode the information via polar coding.
  • K 3 may represent a maximum payload size or a threshold from LDPC coding to another type of coding.
  • the wireless device may determine the type of encoding through a graphical or tabular representation of code decision distribution 300.
  • LDPC region 310-a may consist of one or more BG1 regions and/or one or more BG2 regions.
  • BG2 may be used for lower LDPC code rates and/or lower LDPC payload sizes
  • BG1 may be used for high LDPC code rates and/or high LDPC payload sizes.
  • Thresholds may be also be used in a similar manner to define boundaries and to decide the type of encoding to be performed on the information to be transmitted.
  • FIG. 3B illustrates a code decision distribution 301 in accordance with aspects of the present disclosure.
  • code decision distribution 301 may be implemented by components of wireless communications systems 100 and 200 (e.g., a UE 115 or a base station 105) .
  • Code decision distribution 301 may include a polar region 305-b and a LDPC region 310-b, which may correspond to encoding with polar coding and LDPC coding (e.g., BG1 or BG2) , respectively.
  • Code decision distribution 301 may represent a decision made by a wireless device (e.g., a UE 115 or a base station 105) on how to encode information. For instance, the wireless device may determine a particular code rate and a particular payload size associated with information to be encoded and may determine whether to encode the information using a polar code or a LDPC code based on whether the values are with polar region 305-b or LDPC region 310-b. Such a decision may be determined based on code rate and payload size thresholds.
  • the wireless device may encode the information via polar coding.
  • the wireless device may encode the information via LDPC coding.
  • the wireless device may encode the information via LDPC coding.
  • the wireless device may encode the information via polar coding.
  • K 4 may represent a maximum payload size or a threshold from LDPC coding to another type of coding.
  • the wireless device may determine the type of encoding through a graphical or tabular representation of code decision distribution 301.
  • LDPC region 310-b may similarly consist of one or more BG1 regions and/or one or more BG2 regions.
  • BG2 may be used for lower LDPC code rates and/or lower LDPC payload sizes
  • BG1 may be used for high LDPC code rates and/or high LDPC payload sizes.
  • Thresholds may be also be used in a similar manner to define boundaries and to decide what type of encoding should be performed on the information to be transmitted.
  • FIG. 4 illustrates a process flow 400 in accordance with aspects of the present disclosure.
  • process flow 400 may implement aspects of wireless communications systems 100 and 200, and/or code decision distributions 300 and 301.
  • Process flow 400 may include a base station 105-b and UE 115-b, which may be examples of a base station 105 and a UE 115 as described with reference to FIGs. 1 and 2.
  • base station 105-b and UE 115-b are being used for the present example, process flow may be implemented by any set of wireless devices described herein without deviating from the scope of the present disclosure.
  • base station 105-b may identify a code rate and a block size (e.g., a size associated with or that is a payload size) associated with information (e.g., a set of bits) for transmission (e.g., transmission to UE 115-b) .
  • a block size e.g., a size associated with or that is a payload size
  • information e.g., a set of bits
  • base station 105-b may determine a coding scheme type from a set of coding scheme types for encoding the information. For instance, base station 105-b may determine to perform polar coding or LDPC coding on the information. In some cases, base station 105-b may determine the coding scheme type based on the code rate and the block size. In some cases (e.g., if the channel is a PDCCH) , base station 105-b may determine to use polar coding without considering the code rate and/or block size. In other cases, base station 105-b may not depend on the channel type to determine the coding scheme type associated with the encoded information (e.g., base station 105-b may instead use code rate and/or block size) . In some examples, base station 105-b may determine a coding scheme type based on thresholds such as those described in code decision distributions 300 and 301 of FIGs. 3A and 3B.
  • base station 105-b may encode the information based on the coding scheme type (e.g., polar coding, LDPC coding) .
  • the coding scheme type e.g., polar coding, LDPC coding
  • base station 105-b may transmit the encoded information and UE 115-b may receive the encoded information.
  • Such information may be transmitted through a downlink channel (e.g., a PDCCH or a PDSCH) .
  • the UE 115-b may transmit the encoded information through an uplink channel such as PUCCH or PUSCH, or a sidelink channel (e.g., to another UE) without deviating from the scope of the present disclosure.
  • the encoded information may be transmitted by base station 105-b through a wireless or wired backhaul link (e.g., an Xn or X2 interface) .
  • a wireless or wired backhaul link e.g., an Xn or X2 interface
  • UE 115-b may identify a code rate and a block size associated with the encoded information.
  • UE 115-b may determine a coding scheme type from a set of coding scheme types for decoding the information. For instance, UE 115-b may determine that the encoded information has been encoded with a polar code or an LDPC code. In some cases (e.g., if the channel is a PDCCH) , base station 105-b may determine that the encoded information has been encoded with a polar code without considering the code rate and/or block size. In other cases, UE 115-b may not depend on the channel type to determine the coding scheme type associated with the encoded information (e.g., base station 105-b may instead use code rate and/or block size) . In some examples, UE 115-b may determine a coding scheme type based on thresholds such as those described in code decision distributions 300 and 301 of FIGs. 3A and 3B.
  • UE 115-b may decode the encoded information based on the coding scheme type.
  • UE 115-b may transmit a NACK message to base station 105-b at 440.
  • base station 105-b may choose a new block size and/or code rate based on receiving the NACK and may encode the information according to the new block size and/or code rate. In some cases, the base station 105-b may encode the information according to the same encoding scheme as that which was used at 415.
  • FIG. 5 shows a block diagram 500 of a device 505 in accordance with aspects of the present disclosure.
  • the device 505 may be an example of aspects of a UE 115 or base station 105 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) .
  • Receiver 510 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to hybrid coding design for low latency communications) . Information may be passed on to other components of the device 505.
  • the receiver 510 may be an example of aspects of the transceiver 820 or 920 as described with reference to FIGs. 8 and 9.
  • the receiver 510 may utilize a single antenna or a set of antennas.
  • the communications manager 515 may identify a code rate and a block size associated with a set of information bits for transmission to a second wireless device in the wireless communications system, determine a coding scheme type of a set of coding scheme types for encoding the set of information bits based on the code rate and the block size, encode the set of information bits based on the coding scheme type, and transmit the encoded set of information bits to the second wireless device.
  • the communications manager 515 may also receive a transmission of an encoded set of information bits from a second wireless device in the wireless communications system, identify a code rate and a block size associated with the encoded set of information bits, determine a coding scheme type of a set of coding scheme types for decoding the encoded set of information bits based on the code rate and the block size, and decode the encoded set of information bits based on the coding scheme type.
  • the communications manager 515 may be an example of aspects of the communications manager 810 or 910 as described herein.
  • the communications manager 515 may be implemented in hardware, code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communications manager 515, or its sub-components may be executed 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 the present disclosure.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA field-programmable gate array
  • the communications manager 515 may be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations by one or more physical components.
  • the communications manager 515, or its sub-components may be a separate and distinct component in accordance with various aspects of the present disclosure.
  • the communications manager 515, or its sub-components 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 the present disclosure, or a combination thereof in accordance with various aspects of the present disclosure.
  • I/O input/output
  • Transmitter 520 may transmit signals generated by other components of the device 505.
  • the transmitter 520 may be collocated with a receiver 510 in a transceiver module.
  • the transmitter 520 may be an example of aspects of the transceiver 820 or 920 as described with reference to FIGs. 8 and 9.
  • the transmitter 520 may utilize a single antenna or a set of antennas.
  • FIG. 6 shows a block diagram 600 of a device 605 in accordance with aspects of the present disclosure.
  • the device 605 may be an example of aspects of a device 505, a UE 115, or a base station 105 as described herein.
  • the device 605 may include a receiver 610, a communications manager 615, and a transmitter 650.
  • 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) .
  • Receiver 610 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to hybrid coding design for low latency communications) . Information may be passed on to other components of the device 605.
  • the receiver 610 may be an example of aspects of the transceiver 820 or 920 as described with reference to FIGs. 8 and 9.
  • the receiver 610 may utilize a single antenna or a set of antennas.
  • the communications manager 615 may be an example of aspects of the communications manager 515 as described herein.
  • the communications manager 615 may include a parameter component 620, a coding scheme component 625, an information encoder 630, an information transmitter 635, an information receiver 640, and an information decoder 645.
  • the communications manager 615 may be an example of aspects of the communications manager 810 or 910 as described herein.
  • the parameter component 620 may identify a code rate and a block size associated with a set of information bits for transmission to a second wireless device in the wireless communications system.
  • the coding scheme component 625 may determine a coding scheme type of a set of coding scheme types for encoding the set of information bits based on the code rate and the block size.
  • the information encoder 630 may encode the set of information bits based on the coding scheme type.
  • the information transmitter 635 may transmit the encoded set of information bits to the second wireless device.
  • the information receiver 640 may receive a transmission of an encoded set of information bits from a second wireless device in the wireless communications system.
  • the parameter component 620 may identify a code rate and a block size associated with the encoded set of information bits.
  • the coding scheme component 625 may determine a coding scheme type of a set of coding scheme types for decoding the encoded set of information bits based on the code rate and the block size.
  • the information decoder 645 may decode the encoded set of information bits based on the coding scheme type.
  • Transmitter 650 may transmit signals generated by other components of the device 605.
  • the transmitter 650 may be collocated with a receiver 610 in a transceiver module.
  • the transmitter 650 may be an example of aspects of the transceiver 820 or 920 as described with reference to FIGs. 8 and 9.
  • the transmitter 650 may utilize a single antenna or a set of antennas.
  • FIG. 7 shows a block diagram 700 of a communications manager 705 in accordance with aspects of the present disclosure.
  • the communications manager 705 may be an example of aspects of a communications manager 515, a communications manager 615, or a communications manager 810 described herein.
  • the communications manager 705 may include a parameter component 710, a coding scheme component 715, an information encoder 720, an information transmitter 725, a NACK component 730, an information receiver 735, and an information decoder 740. Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses) .
  • the parameter component 710 may identify a code rate and a block size associated with a set of information bits for transmission to a second wireless device in the wireless communications system. In some examples, the parameter component 710 may compare the code rate to a set of code rate thresholds and the block size to a set of block size thresholds. In some cases, the parameter component 710 may determine a second set of code rate thresholds and a second set of block size thresholds for data. In some aspects, the parameter component 710 may determine a second block size for a second transmission associated with the set of information bits. In some instances, the parameter component 710 may determine the block size based on a payload size associated with the set of information bits. In some cases, at least one of the set of code rate thresholds or the set of block size thresholds includes a set of thresholds.
  • the parameter component 710 may identify a code rate and a block size associated with the encoded set of information bits. In some examples, the parameter component 710 may compare the code rate to a set of code rate thresholds and the block size to a set of block size thresholds. In some cases, the parameter component 710 may determine a second set of code rate thresholds and a second set of block size thresholds for data. In some aspects, the parameter component 710 may determine the block size based on a payload size associated with the encoded set of information bits.
  • the set of code rate thresholds is the same as the second set of code rate thresholds.
  • the set of block size thresholds is the same as the second set of block size thresholds.
  • at least one of the set of code rate thresholds or the set of block size thresholds includes a set of thresholds.
  • the coding scheme component 715 may determine a coding scheme type of a set of coding scheme types for encoding the set of information bits based on the code rate and the block size. In some examples, the coding scheme component 715 may determine the coding scheme type for encoding the set of information bits independent of the channel type. In some cases, for the block size satisfying a first block size threshold of the set of block size thresholds and not satisfying a second block size threshold of the set of block size thresholds, different coding scheme types are selected based on whether the code rate satisfies a code rate threshold of the set of code rate thresholds. In some examples, the coding scheme component 715 may determine the coding scheme type for encoding the set of information bits based on the communication direction.
  • the coding scheme component 715 may determine a coding scheme type of a set of coding scheme types for decoding the encoded set of information bits based on the code rate and the block size. In some cases, the coding scheme component 715 may determine the coding scheme type for decoding the encoded set of information bits independent of the channel type. In some examples, for the block size satisfying a first block size threshold of the set of block size thresholds and not satisfying a second block size threshold of the set of block size thresholds, different coding scheme types are selected based on whether the code rate satisfies a code rate threshold of the set of code rate thresholds. In some aspects, the coding scheme component 715 may determine the coding scheme type for decoding the encoded set of information bits based on the communication direction.
  • the set of coding scheme types includes a polar coding scheme and an LDPC coding scheme.
  • the information encoder 720 may encode the set of information bits based on the coding scheme type and the information transmitter 725 may transmit the encoded set of information bits to the second wireless device.
  • the NACK component 730 may transmit a NACK message to the first wireless device based on decoding the encoded set of information bits.
  • the NACK component 730 may receive a NACK message from the second wireless device in response to transmission of the encoded set of information bits.
  • the information transmitter 725 may transmit the second transmission, the second transmission including code bits encoded according to the coding scheme type.
  • the information receiver 735 may receive a transmission of an encoded set of information bits from a second wireless device in the wireless communications system. In some examples, the information receiver 735 may receive a second transmission from the first wireless device, the second transmission including code bits encoded according to the coding scheme type.
  • the information decoder 740 may decode the encoded set of information bits based on the coding scheme type. In some examples, the information decoder 740 may decode the second transmission based on the coding scheme type and a second block size for the second transmission.
  • FIG. 8 shows a diagram of a system 800 including a device 805 in accordance with aspects of the present disclosure.
  • the device 805 may be an example of or include the components of device 505, device 605, or a UE 115 as described herein.
  • the device 805 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager 810, a transceiver 820, an antenna 825, memory 830, a processor 840, and an I/O controller 850. These components may be in electronic communication via one or more buses (e.g., bus 855) .
  • buses e.g., bus 855
  • the communications manager 810 may identify a code rate and a block size associated with a set of information bits for transmission to a second wireless device in the wireless communications system, determine a coding scheme type of a set of coding scheme types for encoding the set of information bits based on the code rate and the block size, encode the set of information bits based on the coding scheme type, and transmit the encoded set of information bits to the second wireless device.
  • the communications manager 810 may also receive a transmission of an encoded set of information bits from a second wireless device in the wireless communications system, identify a code rate and a block size associated with the encoded set of information bits, determine a coding scheme type of a set of coding scheme types for decoding the encoded set of information bits based on the code rate and the block size, and decode the encoded set of information bits based on the coding scheme type.
  • Transceiver 820 may communicate bi-directionally, via one or more antennas, wired, or wireless links as described herein.
  • the transceiver 820 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver.
  • the transceiver 820 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas.
  • the device 805 may include a single antenna 825. However, in some cases the device 805 may have more than one antenna 825, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.
  • the memory 830 may include random access memory (RAM) , read-only memory (ROM) , or a combination thereof.
  • the memory 830 may store computer-readable code 835 including instructions that, when executed by a processor (e.g., the processor 840) cause the device to perform various functions described herein.
  • a processor e.g., the processor 840
  • the memory 830 may contain, among other things, a basic input output system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.
  • BIOS basic input output system
  • the processor 840 may include an intelligent hardware device, (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) .
  • the processor 840 may be configured to operate a memory array using a memory controller.
  • a 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., the memory 830) to cause the device 805 to perform various functions (e.g., functions or tasks supporting hybrid coding design for low latency communications) .
  • the I/O controller 850 may manage input and output signals for the device 805.
  • the I/O controller 850 may also manage peripherals not integrated into the device 805.
  • the I/O controller 850 may represent a physical connection or port to an external peripheral.
  • the I/O controller 850 may utilize an operating system such as or another known operating system.
  • the I/O controller 850 may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device.
  • the I/O controller 850 may be implemented as part of a processor.
  • a user may interact with the device 805 via the I/O controller 850 or via hardware components controlled by the I/O controller 850.
  • the code 835 may include instructions to implement aspects of the present disclosure, including instructions to support wireless communications.
  • the code 835 may be stored in a non-transitory computer-readable medium such as system memory or other type of memory.
  • the code 835 may not be directly executable by the processor 840 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • FIG. 9 shows a diagram of a system 900 including a device 905 in accordance with aspects of the present disclosure.
  • the device 905 may be an example of or include the components of device 505, device 605, or a base station 105 as described herein.
  • the device 905 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager 910, a network communications manager 915, a transceiver 920, an antenna 925, memory 930, a processor 940, and an inter-station communications manager 945. These components may be in electronic communication via one or more buses (e.g., bus 955) .
  • buses e.g., bus 955
  • the communications manager 910 may identify a code rate and a block size associated with a set of information bits for transmission to a second wireless device in the wireless communications system, determine a coding scheme type of a set of coding scheme types for encoding the set of information bits based on the code rate and the block size, encode the set of information bits based on the coding scheme type, and transmit the encoded set of information bits to the second wireless device.
  • the communications manager 910 may also receive a transmission of an encoded set of information bits from a second wireless device in the wireless communications system, identify a code rate and a block size associated with the encoded set of information bits, determine a coding scheme type of a set of coding scheme types for decoding the encoded set of information bits based on the code rate and the block size, and decode the encoded set of information bits based on the coding scheme type.
  • Network communications manager 915 may manage communications with the core network (e.g., via one or more wired backhaul links) .
  • the network communications manager 915 may manage the transfer of data communications for client devices, such as one or more UEs 115.
  • Transceiver 920 may communicate bi-directionally, via one or more antennas, wired, or wireless links as described herein.
  • the transceiver 920 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver.
  • the transceiver 920 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas.
  • the device 905 may include a single antenna 925. However, in some cases the device 905 may have more than one antenna 925, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.
  • the memory 930 may include RAM, ROM, or a combination thereof.
  • the memory 930 may store computer-readable code 935 including instructions that, when executed by a processor (e.g., the processor 940) cause the device to perform various functions described herein.
  • a processor e.g., the processor 940
  • the memory 930 may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices.
  • the processor 940 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) .
  • the processor 940 may be configured to operate a memory array using a memory controller.
  • a memory controller may be integrated into the processor 940.
  • the processor 940 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 930) to cause the device 905 to perform various functions (e.g., functions or tasks supporting hybrid coding design for low latency communications) .
  • Inter-station communications manager 945 may manage communications with other base station 105, and may include a controller or scheduler for controlling communications with UEs 115 in cooperation with other base stations 105. For example, the inter-station communications manager 945 may coordinate scheduling for transmissions to UEs 115 for various interference mitigation techniques such as beamforming or joint transmission. In some examples, inter-station communications manager 945 may provide an X2 interface within an LTE/LTE-Awireless communication network technology to provide communication between base stations 105.
  • the code 935 may include instructions to implement aspects of the present disclosure, including instructions to support wireless communications.
  • the code 935 may be stored in a non-transitory computer-readable medium such as system memory or other type of memory. In some cases, the code 935 may not be directly executable by the processor 940 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • FIG. 10 shows a flowchart illustrating a method 1000 in accordance with aspects of the present disclosure.
  • the operations of method 1000 may be implemented by a UE 115 or base station 105 or its components as described herein.
  • the operations of method 1000 may be performed by a communications manager as described with reference to FIGs. 5 through 9.
  • a UE or base station may execute a set of instructions to control the functional elements of the UE or base station to perform the functions described below. Additionally or alternatively, a UE or base station may perform aspects of the functions described below using special-purpose hardware.
  • the UE or base station may identify a code rate and a block size associated with a set of information bits for transmission to a second wireless device in the wireless communications system.
  • the operations of 1005 may be performed according to the methods described herein. In some examples, aspects of the operations of 1005 may be performed by a parameter component as described with reference to FIGs. 5 through 9.
  • the UE or base station may determine a coding scheme type of a set of coding scheme types for encoding the set of information bits based on the code rate and the block size.
  • the operations of 1010 may be performed according to the methods described herein. In some examples, aspects of the operations of 1010 may be performed by a coding scheme component as described with reference to FIGs. 5 through 9.
  • the UE or base station may encode the set of information bits based on the coding scheme type.
  • the operations of 1015 may be performed according to the methods described herein. In some examples, aspects of the operations of 1015 may be performed by an information encoder as described with reference to FIGs. 5 through 9.
  • the UE or base station may transmit the encoded set of information bits to the second wireless device.
  • the operations of 1020 may be performed according to the methods described herein. In some examples, aspects of the operations of 1020 may be performed by an information transmitter as described with reference to FIGs. 5 through 9.
  • FIG. 11 shows a flowchart illustrating a method 1100 in accordance with aspects of the present disclosure.
  • the operations of method 1100 may be implemented by a UE 115 or base station 105 or its components as described herein.
  • the operations of method 1100 may be performed by a communications manager as described with reference to FIGs. 5 through 9.
  • a UE or base station may execute a set of instructions to control the functional elements of the UE or base station to perform the functions described below. Additionally or alternatively, a UE or base station may perform aspects of the functions described below using special-purpose hardware.
  • the UE or base station may identify a code rate and a block size associated with a set of information bits for transmission to a second wireless device in the wireless communications system.
  • the operations of 1105 may be performed according to the methods described herein. In some examples, aspects of the operations of 1105 may be performed by a parameter component as described with reference to FIGs. 5 through 9.
  • the UE or base station may determine a coding scheme type of a set of coding scheme types for encoding the set of information bits based on the code rate and the block size.
  • the operations of 1110 may be performed according to the methods described herein. In some examples, aspects of the operations of 1110 may be performed by a coding scheme component as described with reference to FIGs. 5 through 9.
  • the UE or base station may compare the code rate to a set of code rate thresholds and the block size to a set of block size thresholds.
  • the operations of 1115 may be performed according to the methods described herein. In some examples, aspects of the operations of 1115 may be performed by a parameter component as described with reference to FIGs. 5 through 9.
  • the UE or base station may encode the set of information bits based on the coding scheme type.
  • the operations of 1120 may be performed according to the methods described herein. In some examples, aspects of the operations of 1120 may be performed by an information encoder as described with reference to FIGs. 5 through 9.
  • the UE or base station may transmit the encoded set of information bits to the second wireless device.
  • the operations of 1125 may be performed according to the methods described herein. In some examples, aspects of the operations of 1125 may be performed by an information transmitter as described with reference to FIGs. 5 through 9.
  • FIG. 12 shows a flowchart illustrating a method 1200 in accordance with aspects of the present disclosure.
  • the operations of method 1200 may be implemented by a UE 115 or base station 105 or its components as described herein.
  • the operations of method 1200 may be performed by a communications manager as described with reference to FIGs. 5 through 9.
  • a UE or base station may execute a set of instructions to control the functional elements of the UE or base station to perform the functions described below. Additionally or alternatively, a UE or base station may perform aspects of the functions described below using special-purpose hardware.
  • the UE or base station may identify a code rate and a block size associated with a set of information bits for transmission to a second wireless device in the wireless communications system.
  • the operations of 1205 may be performed according to the methods described herein. In some examples, aspects of the operations of 1205 may be performed by a parameter component as described with reference to FIGs. 5 through 9.
  • the UE or base station may determine a coding scheme type of a set of coding scheme types for encoding the set of information bits based on the code rate and the block size.
  • the operations of 1210 may be performed according to the methods described herein. In some examples, aspects of the operations of 1210 may be performed by a coding scheme component as described with reference to FIGs. 5 through 9.
  • the UE or base station may encode the set of information bits based on the coding scheme type.
  • the operations of 1215 may be performed according to the methods described herein. In some examples, aspects of the operations of 1215 may be performed by an information encoder as described with reference to FIGs. 5 through 9.
  • the UE or base station may transmit the encoded set of information bits to the second wireless device.
  • the operations of 1220 may be performed according to the methods described herein. In some examples, aspects of the operations of 1220 may be performed by an information transmitter as described with reference to FIGs. 5 through 9.
  • the UE or base station may receive a NACK message from the second wireless device in response to transmission of the encoded set of information bits.
  • the operations of 1225 may be performed according to the methods described herein. In some examples, aspects of the operations of 1225 may be performed by a NACK component as described with reference to FIGs. 5 through 9.
  • the UE or base station may determine a second block size for a second transmission associated with the set of information bits.
  • the operations of 1230 may be performed according to the methods described herein. In some examples, aspects of the operations of 1230 may be performed by a parameter component as described with reference to FIGs. 5 through 9.
  • the UE or base station may transmit the second transmission, the second transmission including code bits encoded according to the coding scheme type.
  • the operations of 1235 may be performed according to the methods described herein. In some examples, aspects of the operations of 1235 may be performed by an information transmitter as described with reference to FIGs. 5 through 9.
  • FIG. 13 shows a flowchart illustrating a method 1300 in accordance with aspects of the present disclosure.
  • the operations of method 1300 may be implemented by a UE 115 or base station 105 or its components as described herein.
  • the operations of method 1300 may be performed by a communications manager as described with reference to FIGs. 5 through 9.
  • a UE or base station may execute a set of instructions to control the functional elements of the UE or base station to perform the functions described below. Additionally or alternatively, a UE or base station may perform aspects of the functions described below using special-purpose hardware.
  • the UE or base station may receive a transmission of an encoded set of information bits from a second wireless device in the wireless communications system.
  • the operations of 1305 may be performed according to the methods described herein. In some examples, aspects of the operations of 1305 may be performed by an information receiver as described with reference to FIGs. 5 through 9.
  • the UE or base station may identify a code rate and a block size associated with the encoded set of information bits.
  • the operations of 1310 may be performed according to the methods described herein. In some examples, aspects of the operations of 1310 may be performed by a parameter component as described with reference to FIGs. 5 through 9.
  • the UE or base station may determine a coding scheme type of a set of coding scheme types for decoding the encoded set of information bits based on the code rate and the block size.
  • the operations of 1315 may be performed according to the methods described herein. In some examples, aspects of the operations of 1315 may be performed by a coding scheme component as described with reference to FIGs. 5 through 9.
  • the UE or base station may decode the encoded set of information bits based on the coding scheme type.
  • the operations of 1320 may be performed according to the methods described herein. In some examples, aspects of the operations of 1320 may be performed by an information decoder as described with reference to FIGs. 5 through 9.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • a CDMA system may implement a radio technology such as CDMA2000, Universal Terrestrial Radio Access (UTRA) , etc.
  • CDMA2000 covers IS-2000, IS-95, and IS-856 standards.
  • IS-2000 Releases may be commonly referred to as CDMA2000 1X, 1X, etc.
  • IS-856 TIA-856) is commonly referred to as CDMA2000 1xEV-DO, High Rate Packet Data (HRPD) , etc.
  • UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA.
  • a TDMA system may implement a radio technology such as Global System for Mobile Communications (GSM) .
  • GSM Global System for Mobile Communications
  • An OFDMA system may implement a radio technology such as Ultra Mobile Broadband (UMB) , Evolved UTRA (E-UTRA) , Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Flash-OFDM, etc.
  • UMB Ultra Mobile Broadband
  • E-UTRA Evolved UTRA
  • IEEE Institute of Electrical and Electronics Engineers
  • Wi-Fi Institute of Electrical and Electronics Engineers
  • IEEE 802.16 WiMAX
  • IEEE 802.20 Flash-OFDM
  • UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS) .
  • LTE, LTE-A, and LTE-APro are releases of UMTS that use E-UTRA.
  • UTRA, E-UTRA, UMTS, LTE, LTE-A, LTE-APro, NR, and GSM are described in documents from the organization named “3rd Generation Partnership Project” (3GP
  • CDMA2000 and UMB are described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2) .
  • 3GPP2 3rd Generation Partnership Project 2
  • the techniques described herein may be used for the systems and radio technologies mentioned herein as well as other systems and radio technologies. While aspects of an LTE, LTE-A, LTE-APro, or NR system may be described for purposes of example, and LTE, LTE-A, LTE-APro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-APro, or NR applications.
  • a macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions with the network provider.
  • a small cell may be associated with a lower-powered base station, as compared with a macro cell, and a small cell may operate in the same or different (e.g., licensed, unlicensed) frequency bands as macro cells.
  • Small cells may include pico cells, femto cells, and micro cells according to various examples.
  • a pico cell for example, may cover a small geographic area and may allow unrestricted access by UEs with service subscriptions with the network provider.
  • a femto cell may also cover a small geographic area (e.g., a home) and may provide restricted access by UEs having an association with the femto cell (e.g., UEs in a closed subscriber group (CSG) , UEs for users in the home, and the like) .
  • An eNB for a macro cell may be referred to as a macro eNB.
  • An eNB for a small cell may be referred to as a small cell eNB, a pico eNB, a femto eNB, or a home eNB.
  • An eNB may support one or multiple (e.g., two, three, four, and the like) cells, and may also support communications using one or multiple component carriers.
  • the wireless communications systems described herein may support synchronous or asynchronous operation.
  • the base stations may have similar frame timing, and transmissions from different base stations may be approximately aligned in time.
  • the base stations may have different frame timing, and transmissions from different base stations may not be aligned in time.
  • the techniques described herein may be used for either synchronous or asynchronous operations.
  • Information and signals described herein may be represented using any of a variety of different technologies and techniques.
  • data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
  • a general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional 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) .
  • the functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein can be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
  • 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.
  • a non-transitory storage medium may be any available medium that can be accessed by a general purpose or special purpose computer.
  • 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.
  • any connection is properly termed a computer-readable medium.
  • the software is transmitted from a website, server, or other remote source using a 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 medium.
  • Disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD) , floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Probability & Statistics with Applications (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Mathematical Physics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne des procédés, des systèmes et des dispositifs pour les communications sans fil. Un dispositif sans fil (par exemple, un équipement d'utilisateur (UE) ou une station de base) peut déterminer un schéma de codage pour encoder des informations. Le schéma de codage peut être un schéma de codage polaire ou un schéma de codage à contrôle de parité à faible densité (LDPC) et peut être déterminé par le dispositif sans fil en fonction d'un débit de code et d'une taille de bloc (par exemple, une taille associée à une taille de charge utile, ou qui est une taille de charge utile) associés aux informations. Par exemple, le dispositif sans fil peut comparer un débit de code et une taille de bloc associés aux informations avec un nombre de seuils de débit de code et de taille de charge utile et peut déterminer de manière correspondante un type de schéma de codage. Lors de la détermination du type de schéma de codage, le dispositif sans fil peut transmettre les informations encodées à un autre dispositif sans fil.
PCT/CN2018/113354 2018-11-01 2018-11-01 Conception de code hybride pour communications sans fil WO2020087431A1 (fr)

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PCT/CN2018/113354 WO2020087431A1 (fr) 2018-11-01 2018-11-01 Conception de code hybride pour communications sans fil

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WO2018031777A1 (fr) * 2016-08-10 2018-02-15 Idac Holdings, Inc. Codes de contrôle de parité à faible densité (ldcp) en fonction d"un protographe en association avec une requête automatique de répétition hybride (harq)
CN107888331A (zh) * 2016-09-30 2018-04-06 中兴通讯股份有限公司 数据发送方法、装置及信源
CN108123777A (zh) * 2016-11-30 2018-06-05 华为技术有限公司 一种编码方式确定方法及装置

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WO2018031777A1 (fr) * 2016-08-10 2018-02-15 Idac Holdings, Inc. Codes de contrôle de parité à faible densité (ldcp) en fonction d"un protographe en association avec une requête automatique de répétition hybride (harq)
CN107888331A (zh) * 2016-09-30 2018-04-06 中兴通讯股份有限公司 数据发送方法、装置及信源
CN108123777A (zh) * 2016-11-30 2018-06-05 华为技术有限公司 一种编码方式确定方法及装置

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113328829A (zh) * 2021-05-21 2021-08-31 Oppo广东移动通信有限公司 一种编译码方法、设备及计算机存储介质
CN113328829B (zh) * 2021-05-21 2022-12-27 Oppo广东移动通信有限公司 一种编译码方法、设备及计算机存储介质

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