Information indication for RAPTOR code

Abstract

Methods, systems, and devices for wireless communication are described. An encoding device (e.g., a base station or user equipment (UE)) may communicate an indication of a set of encoding symbol identifiers to a decoding device (e.g., a UE or base station) via a control channel. The encoding device may transmit a set of packets associated with a rateless code via a data channel, wherein each packet in the set of packets includes encoding symbols. The decoding device may decode the set of encoding symbols based on the set of encoding symbol identifiers.

Description

Technical Field

[0001] The following relates generally to wireless communications, and more particularly, to information indication for raptor codes. Background Art

[0002] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, etc. These systems can support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems such as long term evolution (LTE) systems, LTE advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems that may be referred to as new radio (NR) systems. These systems may employ techniques such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations or one or more network access nodes, each base station or network access node simultaneously supporting communication of multiple communication devices, which may be referred to as user equipment (UE).

[0003] In some examples, a transmitting device (e.g., a base station or a UE) may transmit a set of packets to a receiving device (e.g., a base station or a UE). If the receiving device fails to receive at least one of the packets, the transmitting device may retransmit the set of packets. As the number of retransmissions performed by the transmitting device increases, the delay associated with the receiving device successfully receiving each of the one or more packets increases. Thus, reducing the number of retransmissions performed can reduce latency. Summary of the Invention

[0004] The described technology relates to improved methods, systems, devices, and apparatuses for supporting information indication for raptor codes. Generally, the described technology provides for a coding device (e.g., a base station or user equipment (UE)) to include an indication of a coding symbol identifier, a source block number, or both in a first signaling message that is separate from a second signaling message that transmits one or more associated packets of coding symbols. For example, the coding device can communicate an indication of a set of coding symbol identifiers for a set of packets encoded with a rateless code with a decoding device (e.g., a UE or base station) via a control channel. The coding device can transmit the set of packets via a data channel, wherein each packet in the set of packets includes coding symbols. The coding device can also transmit an indication of one or more source block numbers associated with the set of packets. The decoding device can decode the set of coding symbols based on the set of coding symbol identifiers or the one or more source block numbers.

[0005] A method of wireless communication is described. The method may include: communicating an indication of a set of encoding symbol identifiers via a control channel; receiving a set of packets associated with a rateless code via a data channel, wherein each packet in the set of packets includes an encoding symbol; and decoding the set of encoding symbols based on the set of encoding symbol identifiers.

[0006] An apparatus for wireless communication is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to: communicate an indication of a set of encoding symbol identifiers via a control channel; receive a set of packets associated with a rateless code via a data channel, wherein each packet in the set of packets includes an encoding symbol; and decode the set of encoding symbols based on the set of encoding symbol identifiers.

[0007] Another apparatus for wireless communication is described. The apparatus may include means for: communicating an indication of a set of encoding symbol identifiers via a control channel; receiving a set of packets associated with a rateless code via a data channel, wherein each packet in the set of packets includes an encoding symbol; and decoding the set of encoding symbols based on the set of encoding symbol identifiers.

[0008] A non-transitory computer-readable medium storing code for wireless communication is described. The code may include instructions executable by a processor to: communicate an indication of a set of encoding symbol identifiers via a control channel; receive a set of packets associated with a rateless code via a data channel, wherein each packet in the set of packets includes an encoding symbol; and decode the set of encoding symbols based on the set of encoding symbol identifiers.

[0009] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating an indication of the set of encoding symbol identifiers may include operations, features, components, or instructions for communicating control signaling including an indication of the set of encoding symbol identifiers via the control channel.

[0010] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the control signaling includes: a downlink control information message including an indication of the set of encoding symbol identifiers; a radio resource control message including an indication of the set of encoding symbol identifiers; or a medium access control (MAC) control element message including an indication of the set of encoding symbol identifiers.

[0011] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating an indication of the set of encoding symbol identifiers may include operations, features, components, or instructions for communicating scheduling information via the control channel, wherein the set of packets is received on the scheduling information, and the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for generating the set of encoding symbol identifiers based on the scheduling information.

[0012] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the scheduling information includes a location of one or more resource blocks, a system frame number, a time slot number, or a codeword number, and wherein generating the set of encoding codeword identifiers can be based on the location of the one or more resource blocks, the system frame number, the time slot number, the codeword number, or a combination thereof.

[0013] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for communicating control signaling including an indication of a source block number.

[0014] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for decoding the set of encoding symbols based on communicating an indication of the source block number.

[0015] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the control signaling includes: a downlink control information message including an indication of the source block number; a radio resource control message including an indication of the source block number; or a media access control (MAC) control element message including an indication of the source block number.

[0016] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, based on communicating the indication of the source block number, each packet in the set of packets does not include any indication of the source block number.

[0017] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating the control signaling including an indication of the source block number may include operations, features, components, or instructions for receiving, at a user device, an indication of the source block number.

[0018] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating the control signaling including an indication of the source block number may include operations, features, components, or instructions for sending an indication of the source block number from a base station.

[0019] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving the packet set may include operations, features, components, or instructions for: receiving a first transport block, wherein the first transport block includes a first set of code blocks, the first set of code blocks including the packet set, and wherein the packet set includes a first set of packets associated with a first redundancy version, and the methods, apparatus, and non-transitory computer-readable media may also include operations, features, components, or instructions for: receiving a second transport block, wherein the second transport block includes a second set of code blocks, the second set of code blocks including a second set of packets associated with a second redundancy version; and sending an indication of a number of the one or more second code blocks in the second set of code blocks based on a failure to successfully decode the one or more second code blocks in the second set of code blocks, wherein the first packet set may be received based on sending the indication of the number.

[0020] In some examples of methods, apparatuses, and non-transitory computer-readable media, each second code block in the second set of code blocks is associated with a corresponding first code block in the first set of code blocks, and the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for identifying a failure to decode a code block in the first set of code blocks that may not be associated with any second code block in the second set of code blocks, and performing a soft combining process using the first set of code blocks and the second set of code blocks based on identifying the failure and the generated set of encoding symbols, wherein decoding the first set of code blocks may be based on performing the soft combining process.

[0021] In some examples of methods, apparatuses, and non-transitory computer-readable media, each second code block in the second set of code blocks is associated with a corresponding first code block in the first set of code blocks, and the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for decoding a code block in the first set of code blocks that may not be associated with any second code block in the second set of code blocks, wherein decoding the first set of packets may be based on decoding a code block that is not associated with any code block in the second set of code blocks.

[0022] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for sending an acknowledgment message based on decoding the set of encoding symbols.

[0023] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, based on communicating the indication of the set of encoding symbol identifiers, each packet in the set of packets does not include any indication of the set of encoding symbol identifiers.

[0024] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, decoding the set of encoding symbols may include operations, features, components, or instructions for performing decoding on the set of encoding symbols according to a raptor code to generate a set of source symbols.

[0025] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating an indication of the set of encoding symbol identifiers may include operations, features, components, or instructions for receiving, at a user device, an indication of the set of encoding symbol identifiers.

[0026] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating an indication of the set of encoding symbol identifiers may include operations, features, components, or instructions for sending, from a base station, an indication of the set of encoding symbol identifiers.

[0027] A method of wireless communication is described. The method may include communicating an indication of a set of encoding symbol identifiers via a control channel and transmitting a set of packets associated with the set of encoding symbol identifiers via a data channel, wherein each packet in the set of packets includes encoding symbols for a rateless code.

[0028] An apparatus for wireless communication is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to: communicate an indication of a set of coding symbol identifiers via a control channel; and transmit a set of packets associated with the set of coding symbol identifiers via a data channel, wherein each packet in the set of packets includes coding symbols for a rateless code.

[0029] Another apparatus for wireless communication is described. The apparatus may include means for: communicating an indication of a set of coding symbol identifiers via a control channel; and transmitting a set of packets associated with the set of coding symbol identifiers via a data channel, wherein each packet in the set of packets includes coding symbols for a rateless code.

[0030] A non-transitory computer-readable medium storing code for wireless communication is described. The code may include instructions executable by a processor to: communicate an indication of a set of encoding symbol identifiers via a control channel; and transmit a set of packets associated with the set of encoding symbol identifiers via a data channel, wherein each packet in the set of packets includes encoding symbols for a rateless code.

[0031] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating an indication of the set of encoding symbol identifiers may include operations, features, components, or instructions for communicating control signaling including an indication of the set of encoding symbol identifiers via the control channel.

[0032] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the control signaling includes: a downlink control information message including an indication of the set of encoding symbol identifiers; a radio resource control message including an indication of the set of encoding symbol identifiers; or a medium access control (MAC) control element message including an indication of the set of encoding symbol identifiers.

[0033] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating an indication of the set of encoding symbol identifiers may include operations, features, components, or instructions for communicating scheduling information via the control channel, and the methods, apparatus, and non-transitory computer-readable media may also include operations, features, components, or instructions for generating the set of encoding symbol identifiers based on the scheduling information, wherein communicating the set of packets may be based on the set of encoding symbol identifiers.

[0034] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the scheduling information includes a location of one or more resource blocks, a system frame number, a time slot number, or a codeword number, and wherein generating the set of encoding codeword identifiers can be based on the location of the one or more resource blocks, the system frame number, the time slot number, the codeword number, or a combination thereof.

[0035] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for communicating control signaling including an indication of a source block number.

[0036] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the control signaling includes: a downlink control information message including an indication of the source block number; a radio resource control message including an indication of the source block number; or a media access control (MAC) control element message including an indication of the source block number.

[0037] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, based on receiving the indication of the source block number, each packet in the set of packets does not include any indication of the source block number.

[0038] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating the control signaling including an indication of the source block number may include operations, features, components, or instructions for receiving, at a user device, an indication of the source block number.

[0039] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating the control signaling including an indication of the source block number may include operations, features, components, or instructions for sending an indication of the source block number from a base station.

[0040] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending the packet set may include operations, features, components, or instructions for: sending a first transport block, wherein the first transport block includes a first set of code blocks, the first set of code blocks including the packet set, and wherein the packet set includes a first set of packets associated with a first redundancy version, and the methods, apparatus, and non-transitory computer-readable media may also include operations, features, components, or instructions for: sending a second transport block, wherein the second transport block includes a second set of code blocks, the second set of code blocks including a second set of packets associated with a second redundancy version; and receiving an indication of a number of one or more second code blocks in the second set of code blocks, wherein the indication of the number indicates that the one or more second code blocks in the second set of code blocks were not successfully decoded, wherein the first packet set may be sent based on receiving the indication of the number.

[0041] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving an acknowledgment message based on sending the set of packets.

[0042] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, based on communicating the indication of the set of encoding symbol identifiers, each packet in the set of packets does not include any indication of the set of encoding symbol identifiers.

[0043] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for encoding the set of source symbols using a raptor code to generate the set of encoded symbols.

[0044] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating an indication of the set of encoding symbol identifiers may include operations, features, components, or instructions for receiving, at a user device, an indication of the set of encoding symbol identifiers.

[0045] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating an indication of the set of encoding symbol identifiers may include operations, features, components, or instructions for sending, from a base station, an indication of the set of encoding symbol identifiers. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 An example of a wireless communication system supporting information indication for raptor codes according to aspects of the present disclosure is illustrated.

[0047] Figure 2 An example of a wireless communication system supporting information indication for raptor codes according to aspects of the present disclosure is illustrated.

[0048] Figure 3 An example of a raptor coding scheme supporting information indication for a raptor code according to aspects of the present disclosure is illustrated.

[0049] Figure 4 An example of a code block decoding scheme supporting information indication for raptor codes according to aspects of the present disclosure is illustrated.

[0050] Figure 5 An example of a process flow supporting information indication for raptor codes according to aspects of the present disclosure is illustrated.

[0051] Figure 6 and Figure 7 A block diagram of a device supporting information indication for raptor codes according to aspects of the present disclosure is shown.

[0052] Figure 8 A block diagram of a communication manager supporting information indication for raptor codes is shown in accordance with aspects of the present disclosure.

[0053] Figure 9 A diagram of a system including a user equipment (UE) supporting information indication for raptor codes is shown in accordance with aspects of the present disclosure.

[0054] Figure 10 A diagram of a system including a base station supporting information indication for raptor codes is shown in accordance with aspects of the present disclosure.

[0055] Figures 11 to 14 A flow chart illustrating a method of supporting information indication for raptor codes according to aspects of the present disclosure is shown. DETAILED DESCRIPTION

[0056] A decoding device (e.g., a user equipment (UE) or a base station) may receive a set of packets from an encoding device (e.g., a base station or a UE). The packet may have codewords encoded according to a raptor code, which is an example of a fountain code. In addition, the packet may include a source block number (SBN) and an encoding codeword identifier (ESI) for each codeword (e.g., in a packet header). However, including the SBN and ESI in the header may result in increased overhead, which may be undesirable when using raptor codes at the radio link control (RLC) or physical (PHY) layer. In addition, if the header is not received correctly because the codeword information is unknown, the decoding device may not be able to perform soft combining, where soft combining refers to a process by which the decoding device can combine a code block of a first redundancy version with a second code block of a second redundancy version to assist in decoding.

[0057] According to various aspects described herein, the encoding device and the decoding device may communicate an indication of the SBN or ESI separately from the packet set. For example, the encoding device and the decoding device may communicate the indication of the SBN or ESI via control signaling (e.g., downlink control information (DCI) signaling, radio resource control (RRC) signaling, media access control (MAC) control element (MAC-CE) signaling) and / or via a control channel (e.g., via a physical downlink control channel (PDCCH), a physical uplink control channel (PUCCH)), and the encoding device may communicate the packet set via a data channel (e.g., via a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH)). Alternatively, the encoding device may communicate scheduling information (e.g., resource block (RB) location, system frame number (SFN), time slot number, symbol number) with the decoding device, and the encoding device or decoding device may use the scheduling information to generate the ESI. For example, the encoding device or decoding device may receive the scheduling information and may generate the ESI based on a function of the scheduling information. For uplink communications, the decoding device may provide an indication of the SBN and ESI. For downlink communications, the encoding device may provide an indication of the SBN and ESI. For sidelink communications, either the encoding device or the decoding device may provide an indication.

[0058] Aspects of the present disclosure are initially described in the context of a wireless communication system. Additional aspects of the present disclosure are described in the context of a raptor encoding scheme, a code block decoding scheme, and a process flow. Aspects of the present disclosure are further illustrated and described by apparatus diagrams, system diagrams, and flow diagrams related to information indication for a raptor code.

[0059] Figure 1An example of a wireless communication system 100 that supports information indication for raptor codes according to aspects of the present disclosure is illustrated. The wireless communication system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a long term evolution (LTE) network, an LTE advanced (LTE-A) network, an LTE-A Pro network, or a new radio (NR) network. In some examples, the wireless communication system 100 may support enhanced broadband communication, ultra-reliable (e.g., mission-critical) communication, low-latency communication, communication with low-cost and low-complexity devices, or any combination thereof.

[0060] Base stations 105 may be dispersed throughout a geographic area to form wireless communication system 100 and may be devices of varying forms or capabilities. Base stations 105 and UEs 115 may communicate wirelessly via one or more communication links 125. Each base station 105 may provide a coverage area 110 over which UEs 115 and base stations 105 may establish one or more communication links 125. Coverage area 110 may be an example of a geographic area over which base stations 105 and UEs 115 may support communication of signals according to one or more radio access technologies.

[0061] The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be fixed or mobile, or fixed or mobile at different times. The UEs 115 may be devices of different forms or with different capabilities. Figure 1 Some example UEs 115 are illustrated in FIG. The UEs 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, base stations 105, or network devices (e.g., core network nodes, relays, integrated access and backhaul (IAB) nodes, or other network devices), such as Figure 1 shown.

[0062] The base stations 105 can communicate with the core network 130, or with each other, or both. For example, the base stations 105 can interface with the core network 130 via one or more backhaul links 120 (e.g., via S1, N2, N3, or other interfaces). The base stations 105 can communicate with each other via the backhaul links 120 (e.g., via X2, Xn, or other interfaces) directly (e.g., directly between the base stations 105), indirectly (e.g., via the core network 130), or both. In some examples, the backhaul links 120 can be or include one or more wireless links.

[0063] One or more of the base stations 105 described herein may include or may be referred to by one of ordinary skill in the art as a base transceiver, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB), a next generation NodeB or a giga-NodeB (any of which may be referred to as a gNB), a Home NodeB, a Home eNodeB, or other suitable terminology.

[0064] UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where a "device" may also be referred to as a unit, a station, a terminal, or a client, among other examples. UE 115 may also include or may be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communication (MTC) device, among other examples, which may be implemented in various objects such as home appliances or vehicles, meters, and other examples.

[0065] The UE 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, which may sometimes act as relays, as well as base stations 105 and network devices, including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, such as Figure 1 shown.

[0066] The UE 115 and the base station 105 can wirelessly communicate with each other via one or more communication links 125 over one or more carriers. The term "carrier" can refer to a collection of radio spectrum resources having a defined physical layer structure for supporting the communication link 125. For example, a carrier for the communication link 125 can include a portion of a radio frequency spectrum band (e.g., a bandwidth part (BWP)) that operates according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel can carry acquisition signaling (e.g., synchronization signals, system information), control signaling to coordinate operations for the carrier, user data, or other signaling. The wireless communication system 100 can support communications with the UE 115 using carrier aggregation or multi-carrier operation. The UE 115 can be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation can be used with both frequency division duplex (FDD) and time division duplex (TDD) component carriers.

[0067] The signal waveform transmitted via the carrier wave may be composed of multiple subcarriers (e.g., using a multicarrier modulation (MCM) technique such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system employing MCM techniques, a resource element may be composed of one symbol period (e.g., the 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 coding rate of the modulation scheme, or both). Therefore, the more resource elements received by the UE 115 and the higher the order of the modulation scheme, the higher the data rate of the UE 115 may be. Wireless communication resources may refer to a combination of radio spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers may further improve the data rate or data integrity of communications with the UE 115.

[0068] The time interval for the base station 105 or the UE 115 may be expressed as a multiple of a basic time unit, which may be, for example, T s =1 / (Δf max ·N f ) seconds sampling period, where Δf max It can represent the maximum supported subcarrier spacing, and N f The maximum supported Discrete Fourier Transform (DFT) size may be indicated. Time intervals of communication resources may be organized according to radio frames, each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by an SFN (e.g., ranging from 0 to 1023).

[0069] Each frame may include a plurality of consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a plurality of time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include a plurality of code element periods (e.g., depending on the length of the cyclic prefix preceding each code element period). In some wireless communication systems 100, a time slot may be further divided into a plurality of micro-time slots containing one or more code elements. In addition to the cyclic prefix, each code element period may contain one or more (e.g., N f The duration of a symbol period may depend on the subcarrier spacing or the operating frequency band.

[0070] A subframe, slot, mini-slot, or symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in a burst of a shortened TTI (sTTI)).

[0071] Physical channels may be multiplexed on a carrier according to various techniques. Physical control channels and physical data channels may be multiplexed on a downlink carrier, for example, using one or more of a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique. A control region (e.g., a control resource set (CORESET)) for a physical control channel may be defined by a number of symbol periods and may extend over the system bandwidth of a carrier or a subset of the system bandwidth. One or more control regions (e.g., CORESETs) may be configured for a set of UEs 115. For example, one or more UEs 115 may monitor or search a control region for control information according to one or more search space sets, and each search space set may include one or more control channel candidates of one or more aggregation levels arranged in a cascaded manner. The aggregation level for a control channel candidate may refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with the coded information for a control information format having a given payload size. The search space sets may include a common search space set configured for transmitting control information to multiple UEs 115 and a UE-specific search space set for transmitting control information to a specific UE 115 .

[0072] In some examples, base stations 105 can be mobile and, therefore, provide communication coverage for mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies can overlap, but the different geographic coverage areas 110 can be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies can be supported by different base stations 105. The wireless communication system 100 can include, for example, a heterogeneous network in which different types of base stations 105 provide coverage for various geographic coverage areas 110 using the same or different radio access technologies.

[0073] The wireless communication system 100 can be configured to support ultra-reliable communication or low-latency communication or various combinations thereof. For example, the wireless communication system 100 can be configured to support ultra-reliable low-latency communication (URLLC) or mission-critical communication. UE 115 can be designed to support ultra-reliable, low-latency or critical functions (e.g., mission-critical functions). Ultra-reliable communication can include private communication or group communication and can be supported by one or more mission-critical services such as mission-critical push-to-talk (MCPTT), mission-critical video (MCVideo), or mission-critical data (MCData). Support for mission-critical functions can include prioritization of services, and mission-critical services can be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, mission-critical, and ultra-reliable low-latency are used interchangeably herein.

[0074] In some examples, UE 115 may also be able to communicate directly with other UEs 115 via device-to-device (D2D) communication links 135 (e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs 115 utilizing D2D communication may be within the geographic coverage area 110 of base station 105. Other UEs 115 in the group may be outside the geographic coverage area 110 of base station 105 or otherwise unable to receive transmissions from base station 105. In some examples, the group of UEs 115 communicating via D2D communication may utilize a one-to-many (1:m) system, in which each UE 115 transmits to each other UE 115 in the group. In some examples, base station 105 facilitates resource scheduling for D2D communication. In other cases, D2D communication is performed between UEs 115 without involving base station 105.

[0075] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), and may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) that manages access and mobility, and at least one user plane entity (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)) that routes packets or interconnects to external networks. The control plane entities may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management for UEs 115 served by base stations 105 associated with the core network 130. User IP packets may be delivered via user plane entities, which may provide IP address allocation and other functions. The user plane entities may be connected to network operator IP services 150. Operator IP services 150 may include access to the Internet, an intranet, an IP multimedia subsystem (IMS), or packet-switched streaming services.

[0076] Certain network devices, such as base stations 105, may include subcomponents such as access network entities 140, which may be examples of access node controllers (ANCs). Each access network entity 140 may communicate with a UE 115 through one or more other access network transport entities 145, which may be referred to as radio heads, smart radio heads, or transmit / receive points (TRPs). Each access network transport entity 145 may include one or more antenna panels. In some configurations, the various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or consolidated into a single network device (e.g., base station 105).

[0077] The wireless communication system 100 can operate using one or more frequency bands typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Typically, the region from 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately 1 decimeter to 1 meter long. UHF waves can be blocked or redirected by buildings and environmental features, but the waves can penetrate structures sufficiently for macro cells to provide service to UEs 115 located indoors. Transmissions using UHF waves can be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to transmissions using the lower frequencies and longer wavelengths of the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0078] The wireless communication system 100 can utilize both licensed and unlicensed radio spectrum bands. For example, the wireless communication system 100 can use license assisted access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating in an unlicensed radio frequency spectrum band, devices such as the base station 105 and the UE 115 can employ carrier sensing for conflict detection and avoidance. In some examples, operations in the unlicensed band can be based on a carrier aggregation configuration in combination with component carriers (e.g., LAA) operating in the licensed band. Operations in the unlicensed spectrum can include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.

[0079] The base station 105 or UE 115 may be equipped with multiple antennas that can be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of the base station 105 or UE 115 may be located within one or more antenna arrays or antenna panels that can support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly such as an antenna tower. In some examples, the antennas or antenna arrays associated with the base station 105 may be located at different geographical locations. The base station 105 may have an antenna array with multiple rows and columns of antenna ports that the base station 105 may use to support beamforming for communications with the UE 115. Similarly, the UE 115 may have one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panels may support radio frequency beamforming for signals transmitted via the antenna ports.

[0080] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used at a transmitting device or a receiving device (e.g., a base station 105, a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming is achieved by combining signals communicated via the antenna elements of an antenna array so that some signals propagating in a particular direction relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals transmitted via the antenna elements may include the transmitting device or the receiving device applying an amplitude shift, a phase shift, or both to the signals carried via the antenna elements associated with the device. The adjustments associated with each antenna element may be defined by a set of beamforming weights associated with a particular direction (e.g., relative to the antenna array of the transmitting device or the receiving device, or relative to some other direction).

[0081] The wireless communication system 100 can be a packet-based network operating according to a layered protocol stack. In the user plane, communications at the bearer or packet data convergence protocol (PDCP) layer can be IP-based. The RLC layer can perform packet segmentation and reassembly to communicate over logical channels. The media access control (MAC) layer can perform priority processing and multiplex logical channels into transport channels. The MAC layer can also use error detection technology, error correction technology, or both to support retransmission at the MAC layer to improve link efficiency. In the control plane, the radio resource control (RRC) protocol layer can provide the establishment, configuration, and maintenance of an RRC connection between the UE 115 and the base station 105 or the core network 130 supporting the radio bearer of user plane data. At the physical layer, transport channels can be mapped to physical channels.

[0082] UE 115 and base station 105 can support retransmission of data to increase the likelihood that the data is successfully received. Hybrid automatic repeat request (HARQ) feedback is a technique that increases the likelihood of correctly receiving data over communication link 125. HARQ can include a combination of error detection (e.g., using a cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ can improve throughput at the MAC layer under poor radio conditions (e.g., low signal-to-noise ratio conditions). In some examples, a device can support HARQ feedback for the same time slot, wherein the device can provide HARQ feedback in a specific time slot for data received in a previous symbol in the time slot. In other cases, a device can provide HARQ feedback in a subsequent time slot or according to some other time interval.

[0083] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcast, and the like. These systems can be multiple-access systems capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Wireless networks, such as wireless local area networks (WLANs), such as Wi-Fi (i.e., Institute of Electrical and Electronics Engineers (IEEE) 802.11) networks, can include access points (APs) that can communicate with one or more wireless or mobile devices. An AP can be coupled to a network, such as the Internet, and can enable mobile devices to communicate via the network (or with other devices coupled to the access point). Wireless devices can communicate bidirectionally with network devices. For example, in a WLAN, a device can communicate with an associated AP via a downlink (e.g., a communication link from the AP to the device) and an uplink (e.g., a communication link from the device to the AP). A wireless personal area network (PAN), which can include a Bluetooth connection, can provide short-range wireless connections between two or more paired wireless devices. For example, a wireless device, such as a cellular phone, can utilize wireless PAN communication to exchange information, such as audio signals, with a wireless headset.

[0084] In some cases, the coding device (e.g., UE 115 or base station 105) may perform fountain coding. Fountain codes (which may also be referred to as network codes based on applications in the network layer) may be rateless codes whose generator matrices may have infinite columns. Performing fountain coding may involve the coding device dividing an RLC service data unit (SDU) into K data blocks s1, ..., s K , where each data block may contain the same number of bits. The encoding device may then use the mother generator matrix to encode the K data blocks into Z packets p1,...,p z For example, the encoding device may determine each of the Z groups as Among them H kz The value of the entry at the zth column and the Hth row of the mother generator matrix k may be represented. Each of the Z groups may correspond to a different column of the mother generator matrix.

[0085] When a decoding device receives a fountain-coded transmission from an encoding device, the decoding device may receive at least some of the Z packets (e.g., Q, where Q ≤ Z). Assuming that the number of successfully received Q packets is greater than a threshold amount (e.g., greater than K), then the decoding device may construct a reversible generator matrix G from the Q packets. For example, the decoding device may identify the header of the first packet in the packet and may identify the columns of the mother generator matrix H from the header. The decoding device may perform this identification and may construct a reversible generator matrix by mapping each of the identified columns of the mother generator matrix H to the columns of the reversible generator matrix G.

[0086] Once the decoding device has generated the reversible generator matrix G, the decoding device may reconstruct K data blocks based on the reversible generator matrix G. For example, if each of the K recovered data blocks is represented by c k where 0 < k ≤ K, and each packet in the packet is represented by p q where 0 < q ≤ Q, then c k may be equal to where may represent the k-th column and the q-th row of the inverse generator matrix G -1 . Generally, if the generator matrix G of the Q data blocks is invertible or if the rank of the reversible generator matrix G is K, then the data blocks can be recovered. For traditional ARQ, the original generator matrix may start with an identity matrix.

[0087] One type of fountain decoding is Luby Transform (LT) decoding. Performing LT encoding may involve randomly selecting a degree d i from a degree distribution and randomly selecting d i different source symbols (which may be of a type of data block with a uniform distribution), and combining them (e.g., performing one or more exclusive OR (XOR) operations). LT decoding (e.g., belief propagation (BP) decoding) may involve first finding the encoded symbols s j connected to a source symbol t i (e.g., the encoded symbol with a degree of 1). Subsequently, the decoding device may set s i equal to t j ; may XOR s i to each encoded symbol connected to s<000,0021>; and may remove each edge connected to the source symbol s i . Such a process may continue until s i is determined for each value of i. If there is no encoded symbol that is only connected to one source symbol , then for that i oThe value decoding process may fail. Alternatively, the decoding device may perform Gaussian elimination (GE) to decode the encoded symbols.

[0088] Raptor decoding can be an enhancement of LT decoding. For example, performing raptor decoding can be similar to performing low-density parity check (LDPC) and LT decoding, where the degree number is less than or equal to a threshold amount (e.g., less than or equal to 3). Raptor codes can be applied to multimedia broadcast multicast services (MBMS). Additionally or alternatively, network codes that can include raptor codes can be used for IAB.

[0089] In some examples, a decoding device (e.g., UE 115 or base station 105) may receive a set of packets from an encoding device (e.g., base station 105 or UE 115). The header for each packet may include an SBN and an ESI for each encoding symbol. The SBN may be an integer identifier of the source block to which the encoding symbol within the packet relates (e.g., the first 16 bits of the header), and the ESI may be an integer identifier of the encoding symbol within the packet (e.g., the last 16 bits of the header). Each packet may also include one or more encoding symbols. Based on the SBN and the ESI, the encoding device and / or the decoding device may determine which source symbol to select to generate the encoding symbol. In some examples, the encoding device may perform triple generation based on the ESI. For example, the encoding device may determine (d, a, b) = Trip(K, X), where K is the number of source symbols and X is the ESI value. Typically, d may be equal to Deg[v], and v may be equal to Rand[Y, 0, 2 20 ], Y can be equal to (B+X*A)%Q, and Q can be equal to less than 2 M where M can be the size of K or X in bits, and % is the modulus operator. In the example where M=16, A can be equal to (53591+J(K)*997)%Q and B can be equal to 10267*(J(K)*997)%Q, where J(K) can be the system index associated with K. Additionally, a can be equal to 1+Rand[Y,1,L′-1] and b can be equal to Rand[Y,2,L′], where L′ can be equal to the smallest prime number greater than or equal to L, and where L=K+S+H, where S can correspond to the number of LDPC symbols and H can correspond to the number of half symbols.

[0090] The encoding device can perform LT - code symbol generation based on triple generation. For example, the encoding device can determine P encoding symbols according to LTEnc(K,C[0],C[1],...,C[L - 1],(d,a,b)). For example, when b≥L, the decoding device can determine b=(b + a) % L′ until b<L, where the result can be C[b]. Then for j = 1,...,min(d - 1,L - 1), the decoding device can determine b=(b + a) % L. Then, when b≥L, the decoding device can determine b=(b + a) % L′ until b<L. Then the decoding device can determine result = result C[b] . Then the result can be returned. Reference can be made to Figure 3 Describe additional details about the encoding symbols.

[0091] In some examples, the Raptor code can be used as an erasure code (e.g., in the application layer). In such examples, each encoding symbol can be correctly decoded or discarded. Thus, SBN and ESI can be added to the encoding symbols as header files. However, when the Raptor code is used at the RLC or PHY layer, using SBN and ESI as header files for the encoding symbols may be disadvantageous. For example, in the case where the decoding device cannot correctly decode the encoding symbols, the decoding device may not be able to access the SBN and ESI information. Thus, the decoding device may lose the soft information of each encoding symbol and may not be able to determine which source symbol to select to generate the encoding symbol. In this case, the decoding device may not be able to perform soft combination, where soft combination refers to the process by which the decoding device can combine the first redundant version of the code block with the second redundant version of the second code block to assist decoding.

[0092] According to various aspects described herein, the encoding device and the decoding device can communicate ESI and SBN separately from the encoding symbols. For example, the encoding device (e.g., base station 105 or UE 115) can communicate an indication of a set of encoding symbol identifiers associated with a set of packets generated using a rateless code to the decoding device (e.g., UE115 or base station 105) via a control channel. The encoding device can send the set of packets via a data channel, where each packet in the set of packets includes an encoding symbol. The decoding device can decode the set of encoding symbols based on the set of encoding symbol identifiers. Additionally, in some cases, the number of SBN and ESI bits can be reduced (e.g., can be less than 16).

[0093] Figure 2An example of a wireless communication system 200 that supports information indication for raptor codes according to aspects of the present disclosure is illustrated. In some examples, the wireless communication system 200 can implement aspects of the wireless communication system 100. For example, the encoding device 205 and the decoding device 210 can each be as described in reference Figure 1 Examples of UE 115 or base station 105 are described.

[0094] At the initial time, the encoding device 205 may have a set of source symbols to indicate to the decoding device 210. Generally, each data of n bits in length may be divided into K = n / l input symbols (e.g., source symbol 230), such that each input symbol may contain 1 bit. The encoding device 205 may use these K symbols to generate encoding symbols. To generate each encoding symbol, the encoding device 205 may encode the source symbol set with a rateless code. For example, if raptor decoding is performed, the encoding device 205 may select a degree d from the degree distribution. i ; At least one source symbol in the source symbols 230 may be selected based on the identified degree; and encoding symbols may be generated based on the selected at least one source symbol in the source symbols. More details about raptor decoding may be described elsewhere herein, for example, with reference to Figure 3 .

[0095] Each encoding symbol in a set of encoding symbols may have an associated ESI and SBN. To communicate the ESI, encoding device 205 may communicate an ESI indication 215 (e.g., an indication of an ESI set) to decoding device 210 via a control channel. For example, one of encoding device 205 or decoding device 210 may send control signaling including the ESI indication 215 to the other of encoding device 205 or decoding device 210 via the control channel. The control signaling may include a DCI message including the ESI indication 215, an RRC message including the ESI indication 215, or a MAC-CE message including the ESI indication 215. Alternatively, one of encoding device 205 or decoding device 210 may send scheduling information via the control channel, which the other of encoding device 205 or decoding device 210 may use to generate the ESI set. The scheduling information may include the location of one or more RBs, SFN, time slot number, or symbol number, which the other of encoding device 205 or decoding device 210 may use to generate the ESI set. For example, the decoding device 210 may determine ESI=f (scheduling information) for each encoding symbol.

[0096] Whether the encoding device 205 or the decoding device 210 provides the ESI indication 215 may be based on the type of communication to be performed between the encoding device 205 and the decoding device 210. For example, for uplink communication, the decoding device 210 may send the ESI indication 215 to the encoding device 205. For downlink communication, the encoding device 205 may send the ESI indication 215 to the decoding device 210. For sidelink communication, the encoding device 205 or the decoding device 210 may send the ESI indication 215.

[0097] To communicate the SBN, the encoding device 205 may communicate an SBN indication 220 (e.g., an indication of the SNB) to the decoding device 210 via a control channel. For example, one of the encoding device 205 or the decoding device 210 may send control signaling including the SBN indication 220 to the other of the encoding device 205 or the decoding device 210 via the control channel. The control signaling may include: a DCI message including the SBN indication 220, an RRC message including the SBN indication 220, or a MAC-CE message including the SBN indication 220.

[0098] Whether the encoding device 205 or the decoding device 210 provides the SBN indication 220 may depend on the type of communication to be performed between the encoding device 205 and the decoding device 210. For example, for uplink communication, the decoding device 210 may send the SBN indication 220 to the encoding device 205. For downlink communication, the encoding device 205 may send the SBN indication 220 to the decoding device 210. For sidelink communication, the encoding device 205 or the decoding device 210 may send the SBN indication 220.

[0099] The encoding device 205 can send the encoded transmission 225 to the decoding device 210 via the data channel. In some examples, before sending the encoded transmission 225 and in the case where the encoded transmission 225 is for downlink communication, the encoding device 205 can: schedule a downlink data channel (e.g., PDSCH); generate ESI based on the scheduling information; and use the ESI to perform triplet generation and LT coded symbol generation (e.g., as shown in FIG. Figure 1) to generate a set of coding symbols. Coded transmission 225 may include a first transport block (TB), which can be divided or partitioned into K first code blocks (CBs) (e.g., where K is a positive integer such as 6) using channel decoding. Each first CB may include a corresponding set of packets, and each set of packets may include one or more coding symbols from a set of coding symbols. In the example where the scheduling information provides an ESI indication 215, the scheduling information may indicate resources that decoding device 210 may use to receive encoded transmission 225 and / or encoding device 205 may use to transmit encoded transmission 225. Based on the ESI indication 215, SBN indication 220, or both being communicated by encoding device 205 to decoding device 210, encoded transmission 225 may not include any indication of an ESI set, an SBN, or both. If decoding device 210 determines the ESI from the scheduling information, the coding symbols may be at least partially transmitted out of order, but may be transmitted based on a calculated ESI (e.g., based on the result of f (scheduling information)).

[0100] Decoding device 210 can receive through coded transmission 225, and can decode one or more code symbols in each grouping set, which can be referred to as code symbol set. In some examples, decoding device 210 can decode code symbol set based on ESI set, SBN or both. For example, decoding device 210 can perform decoding to generate source symbol set according to raptor code. In some examples where coded transmission 225 is downlink transmission, decoding device 210 can generate ESI based on the scheduling information received.

[0101] After receiving through coded transmission 225, decoding device 210 can provide feedback to coding device 205.The type of feedback that decoding device 210 provides can depend on whether decoding device has successfully recovered the source symbol set.For example, if decoding device has successfully recovered each source symbol in the source symbol set (for example, decoding device 210 has successfully decoded each CB in the TB), then decoding device 210 can send confirmation message (for example, confirmation (ACK)) to coding device 205.Alternatively, if decoding device 210 fails to successfully recover each source symbol in the source symbol set (for example, decoding device 210 fails to successfully decode at least one first CB in the first TB), then decoding device 210 can send the number of the first CB that decoding device 210 fails to decode (for example, negative acknowledgment (NACK) first CB or the first CB by NACK).

[0102] If the decoding device 210 provides the encoding device 205 with the number of NACKed first CBs, the encoding device 205 may provide a retransmission. The retransmission may include a second TB including L=K+N second CBs, where N refers to the number of redundant second CBs. The redundant second CB may be a second CB constructed using multiple first CBs. The K first CBs of the encoded transmission 225 may be associated with a first redundancy version (RV), and the K retransmitted non-redundant second CBs may be associated with a second RV. For example, if the K first CBs of the encoded transmission 225 are associated with RV1, the K retransmitted non-redundant second CBs may be associated with RV2. In the circular buffer, the encoding device 205 may send CB_i with RV1, RV2, RV3, and so on. The encoding device 205 may treat the K non-redundant second CBs as source symbols of a systematic raptor code and may generate associated encoding symbols (e.g., N redundant second CBs) for retransmission. If the decoding device 210 fails to decode the N redundant second CBs, the decoding device 210 may perform a decoding process using soft combining, wherein the soft combining may be based on ESI. Additional details about this process may be referred to Figure 4 It should be noted that in some cases, the SBN may not change in each HARQ process. Thus, the SBN indication 220 sent for the coded transmission 225 may not be retransmitted for retransmissions.

[0103] The technology described herein can have one or more advantages. For example, even if the coded code symbols encoded according to the raptor code are not correctly decoded, the decoding device 210 can still determine which source code symbols to select to generate the code symbols. In addition, the decoding device 210 can perform soft combining, which can provide the soft information of the NACK code symbols to the decoding device 210, and therefore can help decode the source code symbols.

[0104] Figure 3 An example of a raptor encoding scheme 300 that supports information indication for a raptor code according to aspects of the present disclosure is illustrated. In some examples, the raptor encoding scheme 300 can be implemented by aspects of the wireless communication system 100. For example, the raptor encoding scheme 300 can be an example of a scheme by which the encoding device 205 can encode source symbols.

[0105] Initially, the encoding device 205 may have a set of source symbols 305. As part of the pre-decoding process, the encoding device 205 may generate intermediate symbols 310. Generating intermediate symbols 310 may involve mapping each source symbol 305 to a unique intermediate symbol 310. For example, source symbol 305-a may be mapped to intermediate symbol 310-a. In addition, generating intermediate symbols may involve mapping multiple source symbols 305 to each of a set of redundant intermediate symbols 315, which may also be referred to as redundant nodes. The redundant intermediate symbols 315 may include S low-density parity-check (LDPC) symbols (e.g., wherein each source symbol 305 may appear three times on S LDPC symbols). Additionally or alternatively, the redundant intermediate symbols 315 may include H half symbols (e.g., wherein each encoding symbol 320 may include ceiling (H / 2) source symbols 305). The redundant intermediate symbols 315 may be based on other intermediate symbols 310 (e.g., the first M intermediate symbols 310). It should be noted that Figure 2 The source code element described in can correspond to the source code element 305 or the intermediate code element 310.

[0106] As part of the LT decoding process, encoding device 205 may generate encoding symbols 320. Generating encoding symbols may involve selecting a degree d from a degree distribution i ; Select or pick d according to uniform distribution i Different intermediate symbols 310 are selected and combined (e.g., by performing one or more XOR operations). Using a uniform distribution ensures that approximately the same amount of each intermediate symbol 310 is selected. In one example, the encoding device 205 can identify two degrees of freedom, select intermediate symbol 310-a and another intermediate symbol 310, and combine them (e.g., by performing an XOR operation) to generate encoding symbol 320-a. In another example, the encoding device 205 can identify one degree of freedom, select intermediate symbol 310-a, and use intermediate symbol 310-a as encoding symbol 320-b. In yet another example, the encoding device 205 can identify three degrees of freedom, select intermediate symbol 310-a and two other intermediate symbols 310, and combine them (e.g., by performing an XOR operation) to generate encoding symbol 320-c. Some encoding symbols 320 may be referred to as systematic symbols 330, while other encoding symbols 320 may be referred to as repair symbols 335.

[0107] Performing the processes described herein can reduce the encoding and decoding complexity of LT codes by reducing the average degree. In this case, the encoding device 205 can perform raptor decoding as described herein, which can use LDPC and LT codes (e.g., weak LT codes) with an average degree below or at a threshold value (e.g., 3).

[0108] Figure 4An example of a code block decoding scheme 400 that supports information indication for raptor codes according to aspects of the present disclosure is illustrated. In some examples, the code block decoding scheme 400 can be implemented by aspects of the wireless communication system 100. For example, the code block decoding scheme 400 can be an example of a process by which the decoding device 210 can decode a transmitted or retransmitted code block.

[0109] As described herein, decoding device 210 may receive an encoded transmission (e.g., encoded transmission 225), wherein the encoded transmission includes a first TB that may be segmented into a first CB set (e.g., 6 first CBs: CB1, CB2, CB3, CB4, CB5, and CB6 with an RV of RV0). Decoding device 210 may perform raptor decoding on the first CB set and may successfully decode the first subset (e.g., CB1, CB3, CB4, and CB5), and may be unable to decode the second subset (e.g., CB2 and CB6). In this manner, decoding device 210 may provide HARQ feedback to encoding device 205. For example, decoding device 210 may indicate the number of first CBs in the second subset (e.g., 2).

[0110] Therefore, encoding device 205 may send a retransmission including a second TB that can be divided into a second set of CBs (e.g., two second CBs: CB7 and CB8 with RV1). Some second CBs may be associated with multiple second CBs. For example, CB7 may be generated by performing an XOR operation on CB2 and CB4, and CB8 may be generated by performing an XOR operation on CB3, CB5, and CB6.

[0111] At 405, the decoding device 210 may receive the retransmission. At 410, the decoding device 210 may perform a first level of decoding (e.g., a packet CRC or checksum) to attempt to verify the encoded bits of the redundant second CBs (e.g., CB7 and CB8). If the decoding device 210 successfully receives the encoded bits of the redundant second CBs, then at 415, the decoding device 210 may perform raptor decoding on the second subset (e.g., CB2 and CB6 with RV) that the decoding device 210 previously failed to decode.

[0112] Alternatively, if the decoding device 210 fails to successfully verify that the coded bits of the redundant second CB are correctly received, the decoding device 210 may calculate, at 420, a log-likelihood ratio (LLR) for the second subset that the decoding device 210 previously failed to decode. For example, the decoding device 210 may determine the LLR for CB2 with RV1 as LLR(CB7)*sign(CB4), and may determine the LLR for CB6 with RV1 as LLR(CB8)*sign(CB3)*sign(CB5). At 425, the decoding device 210 may perform a soft combining process based on the ESI. For example, the decoding device 210 may combine CB2 of RV1 with CB2 of RV0, and may combine CB6 of RV1 with CB6 of RV0.

[0113] At 430, the decoding device 210 may attempt to successfully decode the soft-combined second CBs. If the decoding device 210 succeeds and / or in the case of performing raptor decoding at 415, the decoding device 210 may send an acknowledgement message (e.g., ACK) to the encoding device 205 at 435. If the decoding device 210 fails to successfully decode one or more of the soft-combined second CBs, then at 440, the decoding device 210 may send the number of soft-combined second CBs that the decoding device 210 failed to decode (e.g., one if at least one of CB2 and CB6 was successfully decoded, and two if both CB2 and CB6 were unsuccessfully decoded).

[0114] In some examples, after encoding device 205 receives the number of second CBs that decoding device 210 failed to decode, encoding device 205 may generate a second retransmission that includes a third TB that can be divided into a third set of CBs associated with another RV (e.g., RV2). In such an example, decoding device 210 may repeat the process described herein for the second retransmission.

[0115] Figure 5 An example of a process flow 500 for supporting information indication for a raptor code according to aspects of the present disclosure is illustrated. In some examples, the process flow 500 can implement aspects of the wireless communication system 100. For example, the process flow 500 can be implemented by the encoding device 205-a (which can be as described in reference Figure 2 An example of the encoding device 205 described above) and a decoding device 210-a (which may be an example of the encoding device 205 described above) Figure 2 An example) implementation of the decoding device 210 described.

[0116] At 505, encoding device 205-a may communicate an indication of the set of encoding symbol identifiers to decoding device 210-a via a control channel. If encoding device 205-a is a base station and decoding device 210-a is a UE, encoding device 205-a may send the indication of the set of encoding symbol identifiers to decoding device 210-a. If encoding device 205-a is a UE and decoding device 210-a is a base station, decoding device 210-a may send the indication of the set of encoding symbol identifiers to encoding device 205-a.

[0117] In some examples, communicating the indication of the set of encoding symbol identifiers includes communicating control signaling including the set of encoding symbol identifiers via a control channel. The control signaling can include a DCI message including the indication of the set of encoding symbol identifiers, an RRC message including the indication of the set of encoding symbol identifiers, or a MAC-CE message including the indication of the set of encoding symbol identifiers.

[0118] Alternatively, communicating the indication of the set of encoding symbol identifiers may include communicating scheduling information via a control channel. The encoding device 205-a and / or the decoding device 210-a may generate the set of encoding symbol identifiers based on the scheduling information. The scheduling information may include the location of one or more RBs, SFN, time slot number, symbol number, or any combination thereof.

[0119] At 510, the encoding device 205-a may communicate control signaling including an indication of a source block number with the decoding device 210-a. If the encoding device 205-a is a base station and the decoding device 210-a is a UE, the encoding device 205-a may send the indication of the source block number to the decoding device 210-a. If the encoding device 205-a is a UE and the decoding device 210-a is a base station, the decoding device 210-a may send the indication of the source block number to the encoding device 205-a. The control signaling may include: a DCI message including an indication of the source block number, an RRC message including an indication of the source block number, or a MAC-CE message including an indication of the source block number.

[0120] At 515, encoding device 205-a may transmit a packet set associated with a rateless code (e.g., a raptor code) via a data channel, wherein each packet in the packet set includes coding symbols. Decoding device 210-a may receive the packet set. In some examples, decoding device 210-a may receive and / or encoding device 205-a may transmit the packet set based on scheduling information. In some examples, each packet in the packet set may not include any indication of a coding symbol identifier set, a source block number, or both, based on a communication indicating a coding symbol identifier (e.g., at 505), a source block number (e.g., at 510), or both. In some examples, prior to transmitting the packet set, encoding device 205-a may encode the source symbol set using a raptor code to generate the coding symbol set. Transmitting the packet set may involve transmitting a first TB, wherein the first TB includes a first CB set, the first CB set includes the packet set, and wherein the packet set includes the first packet set associated with a first RV.

[0121] At 520, decoding device 210-a may attempt to decode the set of encoding symbols based on the set of encoding symbol identifiers. In some examples, decoding the set of encoding symbols may be based on communicating an indication of the SFN (e.g., at 510). In some examples, decoding the set of encoding symbols may involve performing decoding on the set of encoding symbols according to a raptor code to generate a set of source symbols.

[0122] The decoding device 210-a may send an acknowledgment message based on decoding the set of encoding symbols at 525. The encoding device 205-a may receive the acknowledgment message.

[0123] At 530 , the decoding device 210 - a may send an indication of a number of one or more first CBs in the first CB that the decoding device 210 a failed to successfully decode.

[0124] In some examples, encoding device 205-a may send a retransmission to decoding device 210-a. The retransmission may include a second TB, where the second TB includes a second CB set, the second CB set including a second set of packets associated with the second RV. Each first CB in the first CB set may be associated with a corresponding first CB in the first CB set. In one example, decoding device 210-a may identify a failure in decoding a CB in the first CB set that is not associated with any second CB in the second CB set. In this case, decoding device 210-a may, based on identifying the failure and the generated set of encoding symbols, perform a soft combining process using the first CB set and the second CB set. Alternatively, decoding device 210-a may successfully decode the second CB set based on performing the soft combining process. In another example, decoding device 210-a may decode a CB in the second CB set that is not associated with any first CB in the first CB set. In such an example, decoding device 210-a may successfully decode the second set of packets based on decoding a CB that is not associated with any CB in the first CB set.

[0125] Figure 6 A block diagram 600 is shown of a device 605 that supports information indication for raptor codes according to aspects of the present disclosure. The device 605 can be an example of aspects of the UE 115 or base station 105 as described herein. The device 605 may include a receiver 610, a communication manager 615, and a transmitter 620. The device 605 may also include a processor. Each of these components can communicate with each other (e.g., via one or more buses).

[0126] The receiver 610 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to information indication for raptor codes, etc.). The information may be passed to other components of the device 605. The receiver 610 may be a reference Figure 9 Examples of various aspects of the transceiver 915 are described. The receiver 610 may utilize a single antenna or a collection of antennas.

[0127] The communication manager 615 can: communicate an indication of a set of encoding symbol identifiers via a control channel; receive a set of packets associated with a rateless code via a data channel, wherein each packet in the set of packets includes an encoding symbol; and decode the set of encoding symbols based on the set of encoding symbol identifiers. The communication manager 615 can also: communicate an indication of a set of encoding symbol identifiers via a control channel; and send a set of packets associated with the set of encoding symbol identifiers via a data channel, wherein each packet in the set of packets includes an encoding symbol for the rateless code. The communication manager 615 can be an example of aspects of the communication manager 910 or 1010 as described herein.

[0128] The communication manager 615 or its subcomponents may be implemented in hardware, in code executed by a processor (e.g., software or firmware), or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 615 or its subcomponents may be performed by a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device designed to perform the functions described in this disclosure, discrete gate or transistor logic, discrete hardware components, or any combination thereof.

[0129] The communication manager 615 or its subcomponents can be physically located in a variety of locations, including being distributed so that portions of the functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the communication manager 615 or its subcomponents can be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 615 or its subcomponents can be combined with one or more other hardware components, including but not limited to input / output (I / O) components, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof.

[0130] Transmitter 620 can transmit signals generated by other components of device 605. In some examples, transmitter 620 can be co-located with receiver 610 in a transceiver module. For example, transmitter 620 can be a reference Figure 9 Examples of various aspects of the transceiver 915 are described. The transmitter 620 may utilize a single antenna or a collection of antennas.

[0131] Figure 7A block diagram 700 of a device 705 supporting information indication for raptor codes according to aspects of the present disclosure is shown. The device 705 can be an example of aspects of the device 605, UE 115, or base station 105 as described herein. The device 705 can include a receiver 710, a communication manager 715, and a transmitter 735. The device 705 can also include a processor. Each of these components can communicate with each other (e.g., via one or more buses).

[0132] The receiver 710 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 information indication for raptor codes, etc.). The information may be passed to other components of the device 705. The receiver 710 may be a reference Figure 9 Examples of various aspects of the transceiver 915 are described. The receiver 710 may utilize a single antenna or a collection of antennas.

[0133] Communications manager 715 may be an example of aspects of communications manager 615 as described herein. Communications manager 715 may include ESI communications component 720, packet communications component 725, and decoding component 730. Communications manager 715 may be an example of aspects of communications manager 910 or 1010 as described herein.

[0134] ESI communicating component 720 can communicate an indication of a set of encoding symbol identifiers via a control channel.

[0135] Packet communication component 725 can receive, via a data channel, a set of packets associated with a rateless code, wherein each packet in the set of packets includes an encoding symbol. Packet communication component 725 can transmit, via a data channel, a set of packets associated with a set of encoding symbol identifiers, wherein each packet in the set of packets includes an encoding symbol for the rateless code.

[0136] Decoding component 730 can decode the set of encoding symbols based on the set of encoding symbol identifiers.

[0137] The transmitter 735 can transmit signals generated by other components of the device 705. In some examples, the transmitter 735 can be co-located with the receiver 710 in a transceiver module. For example, the transmitter 735 can be a reference Figure 9 Examples of various aspects of the transceiver 915 are described. The transmitter 735 can utilize a single antenna or a collection of antennas.

[0138] Figure 8A block diagram 800 is shown of a communication manager 805 that supports information indication for raptor codes in accordance with aspects of the present disclosure. The communication manager 805 can be an example of aspects of the communication manager 615, the communication manager 715, or the communication manager 910 described herein. The communication manager 805 can include an ESI communication component 810, a packet communication component 815, a decoding component 820, an SBN communication component 825, a feedback component 830, a failure identification component 835, a soft combining process component 840, and an encoding component 845. Each of these modules can communicate with each other directly or indirectly (e.g., via one or more buses).

[0139] ESI communication component 810 can communicate an indication of the set of encoding symbol identifiers via a control channel. In some examples, ESI communication component 810 communicating (e.g., sending or receiving) the indication of the set of encoding symbol identifiers can involve ESI communication component 810 communicating control signaling including the indication of the set of encoding symbol identifiers via the control channel. In some cases, the control signaling includes a downlink control information message including the indication of the set of encoding symbol identifiers; a radio resource control message including the indication of the set of encoding symbol identifiers; or a medium access control (MAC) control element message including the indication of the set of encoding symbol identifiers.

[0140] In some examples, communicating an indication of the set of encoding symbol identifiers by ESI communication component 810 can involve ESI communication component 810 communicating (e.g., sending or receiving) scheduling information via the control channel. In some such examples, the set of packets can be communicated based on the scheduling information. In some examples, ESI communication component 810 can generate the set of encoding symbol identifiers based on the scheduling information. In some cases, the scheduling information includes a location of one or more resource blocks, a system frame number, a time slot number, or a symbol number, and generating the set of encoding symbol identifiers is based on the location of the one or more resource blocks, the system frame number, the time slot number, the symbol number, or a combination thereof.

[0141] In some examples, ESI communication component 810 communicating an indication of the set of encoding symbol identifiers may include: ESI communication component 810 receiving an indication of the set of encoding symbol identifiers at a user device. In some examples, ESI communication component 810 communicating an indication of the set of encoding symbol identifiers may include: ESI communication component 810 transmitting an indication of the set of encoding symbol identifiers from a base station. In some examples, ESI communication component 810 may communicate control signaling including an indication of the set of encoding symbol identifiers via the control channel. In some examples, ESI communication component 810 may generate the set of encoding symbol identifiers based on the scheduling information, wherein transmitting the set of packets is based on the set of encoding symbol identifiers.

[0142] In some examples, the ESI communication component 810 can receive an indication of the set of encoding symbol identifiers at a user device. In some examples, the ESI communication component 810 can send an indication of the set of encoding symbol identifiers from a base station. In some cases, the control signaling includes: a downlink control information message including an indication of the set of encoding symbol identifiers; a radio resource control message including an indication of the set of encoding symbol identifiers; or a medium access control (MAC) control element message including an indication of the set of encoding symbol identifiers. In some cases, the scheduling information includes a location of one or more resource blocks, a system frame number, a time slot number, or a codeword number, and wherein generating the set of encoding symbol identifiers can be based on the location of the one or more resource blocks, the system frame number, the time slot number, the codeword number, or a combination thereof.

[0143] The packet communication component 815 can receive a set of packets associated with a rateless code via a data channel, wherein each packet in the set of packets includes coding symbols. In some examples, each packet in the set of packets may not include any indication of the source block number based on control signaling including an indication of the source block number communicated by the SBN communication component 825. In some examples, each packet in the set of packets may not include any indication of the code symbol identifier set based on an indication of the code symbol identifier set communicated by the ESI communication component 810. In some examples, a set of packets associated with the code symbol identifier set is sent via a data channel, wherein each packet in the set of packets includes coding symbols for the rateless code.

[0144] In some examples, packet communicating component 815 receiving the set of packets can involve: packet communicating component 815 receiving a first transport block, wherein the first transport block includes a first set of code blocks, the first set of code blocks including the set of packets, and wherein the set of packets includes a first set of packets associated with a first redundancy version. In some such examples, packet communicating component 815 can receive a second transport block, wherein the second transport block includes a second set of code blocks, the second set of code blocks including a second set of packets associated with a second redundancy version. In some examples, each second code block in the second set of code blocks is associated with a corresponding first code block in the first set of code blocks.

[0145] In some examples, packet communicating component 815 transmitting the set of packets can involve packet communicating component 815 transmitting a first transport block, wherein the first transport block includes a first set of code blocks, the first set of code blocks including the set of packets, and wherein the set of packets includes a first set of packets associated with a first redundancy version. In some such examples, packet communicating component 815 can transmit a second transport block, wherein the second transport block includes a second set of code blocks, the second set of code blocks including a second set of packets associated with a second redundancy version.

[0146] Decoding component 820 can decode the set of coding symbols based on the coding symbol identifier set. In some examples, decoding the set of coding symbols can be based on an indication of the source block number communicated. In some examples, decoding component 820 can decode code blocks (e.g., redundant code blocks) in the first code block set that are not associated with any code block in the second code block set, wherein decoding the first grouping set is based on decoding code blocks that are not associated with any code block in the second code block set. In some examples, decoding component 820 decoding the set of coding symbols involves decoding component 820 performing decoding on the set of coding symbols according to a raptor code to generate a set of source symbols.

[0147] SBN communication component 825 may communicate control signaling including an indication of a source block number. In some cases, the control signaling includes: a downlink control information message including an indication of the source block number; a radio resource control message including an indication of the source block number; or a media access control (MAC) control element message including an indication of the source block number. In some examples, communicating the control signaling by SBN communication component 825 may involve receiving, at a user equipment, an indication of the source block number. In some examples, communicating the control signaling by SBN communication component 825 may involve transmitting, from a base station, an indication of the source block number. In some examples, communicating the control signaling by SBN communication component 825 may involve transmitting, from a base station, an indication of the source block number. In some examples, communicating the control signaling by SBN communication component 825 may include receiving, at a user equipment, an indication of the source block number. In some examples, transmitting, from a base station, an indication of the source block number. In some cases, the control signaling includes: a downlink control information message including an indication of the source block number; a radio resource control message including an indication of the source block number; or a medium access control (MAC) control element message including an indication of the source block number.

[0148] Feedback component 830 can send an indication of the number of one or more code blocks in the set of code blocks based on an unsuccessful decoding of the one or more code blocks in the set of code blocks, wherein the first set of packets is received based on sending the indication of the number (e.g., by packet communication component 815). In some examples, feedback component 830 can send an acknowledgment message based on decoding the set of encoding symbols. In some examples, feedback component 830 can receive an indication of the number of one or more code blocks in the set of code blocks, wherein the indication of the number indicates an unsuccessful decoding of the one or more code blocks in the set of code blocks, wherein the first set of packets is sent based on receiving the indication of the number (e.g., by packet communication component 815). In some examples, feedback component 830 can receive an acknowledgment message based on sending the set of packets.

[0149] The failure identification component 835 can identify a failure to decode a code block in the first set of code blocks that is not associated with any second code block in the second set of code blocks.

[0150] The soft combining process component 840 can perform a soft combining process using the first set of code blocks and the second set of code blocks based on identifying the failure and the generated set of encoding symbols, wherein decoding the first set of code blocks (e.g., by the decoding component 820) is based on performing the soft combining process.

[0151] The encoding component 845 can encode the set of source symbols using a raptor code to generate the set of encoded symbols.

[0152] Figure 9 A diagram of a system 900 including a device 905 that supports information indication for raptor codes according to aspects of the present disclosure is shown. The device 905 can be an example of, or include a component of, the device 605, device 705, or UE 115 as described herein. The device 905 can include components for two-way voice and data communications, including components for sending and receiving communications, including a communication manager 910, a transceiver 915, an antenna 920, a memory 925, and a processor 935. These components can communicate electronically via one or more buses (e.g., bus 940).

[0153] The communication manager 910 may communicate an indication of a set of encoding symbol identifiers via a control channel; receive a set of packets associated with a rateless code via a data channel, wherein each packet in the set of packets includes an encoding symbol; and decode the set of encoding symbols based on the set of encoding symbol identifiers. The communication manager 910 may also communicate an indication of a set of encoding symbol identifiers via a control channel; and send a set of packets associated with the set of encoding symbol identifiers via a data channel, wherein each packet in the set of packets includes an encoding symbol for the rateless code.

[0154] The transceiver 915 can communicate bidirectionally via one or more antennas, wired or wireless links as described above. For example, the transceiver 915 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The transceiver 915 can also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, and demodulate packets received from the antenna.

[0155] In some cases, a wireless device may include a single antenna 920. However, in some cases, a device may have more than one antenna 920, which may be capable of sending or receiving multiple wireless transmissions simultaneously.

[0156] The memory 925 may include random access memory (RAM) and read-only memory (ROM). The memory 925 may store computer-readable, computer-executable code 930, which includes instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, the memory 925 may include, among other things, a basic input / output system (BIOS), which may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0157] The code 930 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 930 may be stored in a non-transitory computer-readable medium, such as system memory or other types of memory. In some cases, the code 930 may not be directly executed by the processor 935, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0158] The processor 935 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, the processor 935 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 935. The processor 935 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 925) to cause the device 905 to perform various functions (e.g., functions or tasks that support information indicating a raptor code).

[0159] Figure 10 A diagram of a system 1000 including a device 1005 that supports information indication for raptor codes according to various aspects of the present disclosure is shown. The device 1005 can be an example of, or include a component of, the device 605, device 705, or base station 105 as described herein. The device 1005 can include components for two-way voice and data communications, including components for sending and receiving communications, including a communication manager 1010, a transceiver 1015, an antenna 1020, a memory 1025, and a processor 1035. These components can communicate electronically via one or more buses (e.g., bus 1040).

[0160] The communication manager 1010 may communicate an indication of a set of encoding symbol identifiers via a control channel; receive a set of packets associated with a rateless code via a data channel, wherein each packet in the set of packets includes an encoding symbol; and decode the set of encoding symbols based on the set of encoding symbol identifiers. The communication manager 1010 may also communicate an indication of a set of encoding symbol identifiers via a control channel; and send a set of packets associated with the set of encoding symbol identifiers via a data channel, wherein each packet in the set of packets includes an encoding symbol for the rateless code.

[0161] The transceiver 1015 can communicate bidirectionally via one or more antennas, wired or wireless links as described above. For example, the transceiver 1015 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The transceiver 1015 can also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, and demodulate packets received from the antenna.

[0162] In some cases, a wireless device may include a single antenna 1020. However, in some cases, a device may have more than one antenna 1020, which may be capable of sending or receiving multiple wireless transmissions simultaneously.

[0163] Memory 1025 may include RAM and ROM. Memory 1025 may store computer-readable, computer-executable code 1030 including instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, memory 1025 may contain, among other things, BIOS, which may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0164] The code 1030 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 1030 may be stored in a non-transitory computer-readable medium such as system memory or other types of memory. In some cases, the code 1030 may not be directly executed by the processor 1035, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0165] The processor 1035 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, the processor 1035 may be configured to operate the memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 1035. The processor 1035 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1025) to cause the device 1005 to perform various functions (e.g., supporting functions or tasks indicated by information for the raptor code).

[0166] Figure 11 105 or 106. FIG. 106 is a flowchart illustrating a method 1100 for supporting information indication for a raptor code according to aspects of the present disclosure. As described herein, the operations of the method 1100 may be implemented by a UE 115 or a base station 105 or components thereof. For example, the operations of the method 1100 may be implemented by a UE 115 or a base station 105 as described in reference to FIG. Figures 6 to 10In some examples, the UE or base station may execute a set of instructions to control the functional elements of the UE or base station to perform the described functions. Additionally or alternatively, the UE or base station may use dedicated hardware to perform various aspects of the described functions.

[0167] At 1105, the UE or base station may communicate an indication of a set of encoding symbol identifiers via a control channel. The operations of 1105 may be performed according to the methods described herein. In some examples, aspects of the operations of 1105 may be as described with reference to Figures 6 to 10 The described ESI communication components are implemented.

[0168] At 1110, the UE or base station may receive a set of packets associated with a rateless code via a data channel, wherein each packet in the set of packets includes a coding symbol. The operations of 1110 may be performed according to the methods described herein. In some examples, aspects of the operations of 1110 may be as described with reference to Figures 6 to 10 The described packet communication components are used to perform.

[0169] At 1115, the UE or base station may decode the set of encoding symbols based on the set of encoding symbol identifiers. The operations of 1115 may be performed according to the methods described herein. In some examples, aspects of the operations of 1115 may be as described with reference to Figures 6 to 10 The decoding component described is performed.

[0170] Figure 12 A flow chart illustrating a method 1200 for supporting information indication for raptor codes according to aspects of the present disclosure is shown. As described herein, the operations of the method 1200 may be implemented by the UE 115 or the base station 105 or components thereof. For example, the operations of the method 1200 may be implemented by the UE 115 or the base station 105 as described in reference to FIG. Figures 6 to 10 In some examples, the UE or base station may execute a set of instructions to control the functional elements of the UE or base station to perform the described functions. Additionally or alternatively, the UE or base station may use dedicated hardware to perform various aspects of the described functions.

[0171] At 1205, the UE or base station may communicate control signaling including an indication of a set of encoding symbol identifiers via a control channel. The operations of 1205 may be performed according to the methods described herein. In some examples, aspects of the operations of 1205 may be as described with reference to Figures 6 to 10 The described ESI communication components are implemented.

[0172] At 1210, the UE or base station may receive a set of packets associated with a rateless code via a data channel, wherein each packet in the set of packets includes a coding symbol. 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 as described with reference to Figures 6 to 10 The described packet communication components are used to perform.

[0173] At 1215, the UE or base station may decode the set of encoding symbols based on the set of encoding symbol identifiers. The operations of 1215 may be performed according to the methods described herein. In some examples, aspects of the operations of 1215 may be as described with reference to Figures 6 to 10 The decoding component described is performed.

[0174] At 1220, the UE or base station may communicate control signaling including an indication of the set of encoding symbol identifiers via a control channel. The operations of 1220 may be performed according to the methods described herein. In some examples, aspects of the operations of 1220 may be as described with reference to Figures 6 to 10 The described ESI communication components are implemented.

[0175] Figure 13 105 or 106. A flowchart illustrating a method 1300 for supporting information indication for raptor codes according to aspects of the present disclosure is shown. As described herein, the operations of the method 1300 may be implemented by the UE 115 or the base station 105 or components thereof. For example, the operations of the method 1300 may be implemented by reference to Figures 6 to 10 In some examples, the UE or base station may execute a set of instructions to control the functional elements of the UE or base station to perform the described functions. Additionally or alternatively, the UE or base station may use dedicated hardware to perform various aspects of the described functions.

[0176] At 1305, the UE or base station may communicate scheduling information. Operation 1305 may be performed according to methods described herein. In some examples, aspects of the operation of 1305 may be performed as described with reference to Figures 6 to 10 The described ESI communication components are implemented.

[0177] At 1310, the UE or base station may generate the set of encoding symbol identifiers based on the scheduling information. The operations of 1310 may be performed according to the methods described herein. In some examples, aspects of the operations of 1310 may be as described with reference to Figures 6 to 10 The described ESI communication components are implemented.

[0178] At 1315, the UE or base station may receive a set of packets associated with a rateless code via a data channel based on the scheduling information, wherein each packet in the set of packets includes a coding symbol. The operations of 1315 may be performed according to the methods described herein. In some examples, aspects of the operations of 1315 may be as described with reference to Figures 6 to 10 The described packet communication components are used to perform.

[0179] At 1320, the UE or base station may decode the set of encoding symbols based on the set of encoding symbol identifiers. The operations of 1320 may be performed according to the methods described herein. In some examples, aspects of the operations of 1320 may be as described with reference to Figures 6 to 10 The decoding component described is performed.

[0180] Figure 14 1400 according to various aspects of the present disclosure. As described herein, the operations of the method 1400 may be implemented by the UE 115 or the base station 105 or components thereof. For example, the operations of the method 1400 may be implemented by the UE 115 or the base station 105 as described in reference to FIG. Figures 6 to 10 In some examples, the UE or base station may execute a set of instructions to control the functional elements of the UE or base station to perform the described functions. Additionally or alternatively, the UE or base station may use dedicated hardware to perform various aspects of the described functions.

[0181] At 1405, the UE or base station may communicate an indication of a set of encoding symbol identifiers via a control channel. The operations of 1305 may be performed according to the methods described herein. In some examples, aspects of the operations of 1405 may be as described with reference to Figures 6 to 10 The described ESI communication components are implemented.

[0182] At 1410, the UE or base station may transmit a set of packets associated with the set of encoding symbol identifiers via a data channel, wherein each packet in the set of packets includes encoding symbols for a rateless code. The operations of 1410 may be performed according to the methods described herein. In some examples, aspects of the operations of 1410 may be described with reference to Figures 6 to 10 The described packet communication components are used to perform.

[0183] It should be noted that the methods described herein describe possible implementations, and that operations and steps may be rearranged or otherwise modified, and other implementations are possible. Additionally, aspects from two or more methods may be combined.

[0184] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes, and the terminology of LTE, LTE-A, LTE-A Pro, or NR may be used in many descriptions, the techniques described herein can be applied beyond LTE, LTE-A, LTE-A Pro, or NR networks. For example, the techniques described can be applicable to various other wireless communication systems, such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0185] The information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout this specification may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0186] The various illustrative blocks and components described in conjunction with the disclosure herein may be implemented or performed using a general purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a DSP and a microprocessor, a plurality of microprocessors, a combination of one or more microprocessors and a DSP core, or any other such configuration).

[0187] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored on or transmitted over a computer-readable medium as one or more instructions or codes on a computer-readable medium. Other examples and specific embodiments are within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described herein can be implemented using software executed by a processor, hardware, firmware, hard wiring, or any combination thereof. Features that implement the functions can also be physically located in various locations, including being distributed so that parts of the functions are implemented at different physical locations.

[0188] Computer-readable media include non-transitory computer storage media and communication media, and communication media include any medium that is convenient for transferring a computer program from one place to another.Non-transitory storage media can be any available medium that can be accessed by a general or special-purpose computer.As an example and not limitation, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disc (CD) ROM or other optical disc storage, disk storage or other magnetic storage devices, or may be used for carrying or storing required program code components in the form of instructions or data structures and any other non-transitory medium that can be accessed by a general or special-purpose computer or a general or special-purpose processor. In addition, any connection is also properly referred to as computer-readable media. For example, if software is sent from a website, server or other remote source using coaxial cable, optical cable, twisted pair, digital subscriber line (DSL) or wireless technologies such as infrared, radio and microwave, then coaxial cable, optical cable, twisted pair, DSL or wireless technologies such as infrared, radio and microwave are all included in the definition of computer-readable media. Disk and disc, as used herein, include CDs, laser discs, optical discs, digital versatile discs (DVDs), floppy disks, and Blu-ray discs, where disks usually reproduce data magnetically, while discs reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable media.

[0189] As used herein (including in the claims), "or" as used in a list of items (e.g., a list of items ending with a phrase such as "at least one of" or "one or more of") indicates an inclusive list, so that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Furthermore, as used herein, the phrase "based on" should not be interpreted as a reference to a closed set of conditions. For example, an example step described as "based on condition A" could be based on both condition A and condition B without departing from the scope of this disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on."

[0190] In the drawings, similar components or features may have the same reference number. In addition, various components of the same type may be distinguished by following the reference number with a dash and a second reference number that distinguishes the similar components. If only the first reference number is used in the specification, the description applies to any similar component having the same first reference number, regardless of the second or subsequent reference numbers.

[0191] The description set forth herein in conjunction with the accompanying drawings describes example configurations and does not represent all examples that may be implemented or within the scope of the claims. The term "example" as used herein means "serving as an example, instance, or illustration," rather than "preferred" or "superior to other examples." The detailed description includes specific details for the purpose of providing an understanding of the described technology. However, these technologies can be practiced without these specific details. In some cases, known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0192] The description herein is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to the present disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Therefore, the present disclosure is not limited to the examples and designs described herein, but should be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication, comprising: communicating, via the control channel, an indication of a plurality of encoding symbol identifiers for the encoding symbols; receiving, via a data channel, a plurality of packets associated with a rateless code, wherein each packet of the plurality of packets includes an encoding symbol; as well as The plurality of encoding symbols are decoded based at least in part on the plurality of encoding symbol identifiers.

2. The method of claim 1 , wherein communicating an indication of the plurality of encoding symbol identifiers comprises: Control signaling including an indication of the plurality of encoding symbol identifiers is communicated via the control channel.

3. The method according to claim 2, wherein the control signaling comprises: a downlink control information message comprising an indication of the plurality of encoding symbol identifiers; A radio resource control message comprising an indication of the plurality of encoding symbol identifiers; or a medium access control (MAC) control element message comprising an indication of the plurality of encoding symbol identifiers.

4. The method of claim 1 , wherein communicating an indication of the plurality of encoding symbol identifiers comprises: communicating scheduling information via the control channel, and wherein the plurality of packets are received based at least in part on the scheduling information, the method further comprising: The plurality of encoding symbol identifiers are generated based at least in part on the scheduling information.

5. The method of claim 4 , wherein the scheduling information comprises a position of one or more resource blocks, a system frame number, a time slot number, or a codeword number, and wherein generating the plurality of encoding codeword identifiers is based at least in part on the position of the one or more resource blocks, the system frame number, the time slot number, the codeword number, or a combination thereof.

6. The method according to claim 1, further comprising: The communication includes control signaling indicating the source block number.

7. The method of claim 6, wherein decoding the plurality of encoding symbols is based at least in part on communicating an indication of the source block number.

8. The method according to claim 6, wherein the control signaling comprises: a downlink control information message comprising an indication of said source block number; a radio resource control message comprising an indication of the source block number; or a medium access control (MAC) control element message comprising an indication of the source block number.

9. The method of claim 6, wherein each packet in the plurality of packets does not include any indication of the source block number based at least in part on communicating the indication of the source block number.

10. The method of claim 6, wherein communicating the control signaling including an indication of the source block number comprises: An indication of the source block number is received at a user device.

11. The method of claim 6, wherein communicating the control signaling including an indication of the source block number comprises: An indication of the source block number is sent from a base station.

12. The method of claim 1 , wherein receiving the plurality of packets comprises: receiving a first transport block, wherein the first transport block comprises a plurality of first code blocks, the plurality of first code blocks comprising the plurality of packets, and wherein the plurality of packets comprises a plurality of first packets associated with a first redundancy version, the method further comprising: receiving a second transport block, wherein the second transport block comprises a plurality of second code blocks including a plurality of second packets associated with a second redundancy version; and An indication of a number of the one or more second code blocks in the plurality of second code blocks is sent based at least in part on an inability to successfully decode the one or more second code blocks in the plurality of second code blocks, wherein the plurality of first packets are received based at least in part on sending the indication of the number.

13. The method according to claim 12, wherein each second code block of the plurality of second code blocks is associated with a corresponding first code block of the plurality of first code blocks, the method further comprising: identifying a failure to decode a code block in the plurality of first code blocks that is not associated with any second code block in the plurality of second code blocks; as well as Based at least in part on identifying the failure and the generated plurality of encoding symbols, a soft combining process is performed using the plurality of first code blocks and the plurality of second code blocks, wherein decoding the plurality of first code blocks is based at least in part on performing the soft combining process.

14. The method of claim 12, wherein each second code block of the plurality of second code blocks is associated with a corresponding first code block of the plurality of first code blocks, the method further comprising: A code block of the plurality of first code blocks that is not associated with any second code block of the plurality of second code blocks is decoded, wherein decoding the plurality of first packets is based at least in part on decoding the code block that is not associated with any code block of the plurality of second code blocks.

15. The method according to claim 1, further comprising: An acknowledgement message is sent based at least in part on decoding the plurality of encoding symbols.

16. The method of claim 1, wherein each packet in the plurality of packets does not include any indication of the plurality of encoding symbol identifiers based at least in part on communicating an indication of the plurality of encoding symbol identifiers.

17. The method of claim 1, wherein: Decoding the plurality of encoding symbols includes performing decoding on the plurality of encoding symbols according to a raptor code to generate a plurality of source symbols.

18. The method of claim 1 , wherein communicating an indication of the plurality of encoding symbol identifiers comprises: An indication of the plurality of encoding symbol identifiers is received at a user equipment.

19. The method of claim 1 , wherein communicating an indication of the plurality of encoding symbol identifiers comprises: An indication of the plurality of encoding symbol identifiers is sent from a base station.

20. A method for wireless communication, comprising: communicating, via the control channel, an indication of a plurality of encoding symbol identifiers for the encoding symbols; as well as A plurality of packets associated with the plurality of encoding symbol identifiers are transmitted via a data channel, wherein each packet of the plurality of packets includes encoding symbols for a rateless code.

21. The method of claim 20, wherein communicating an indication of the plurality of encoding symbol identifiers comprises: Control signaling including an indication of the plurality of encoding symbol identifiers is communicated via the control channel.

22. The method of claim 21, wherein the control signaling comprises: A downlink control information message comprising an indication of the plurality of encoding symbol identifiers; a radio resource control message comprising an indication of the plurality of encoding symbol identifiers; or a medium access control (MAC) control element message comprising an indication of the plurality of encoding symbol identifiers.

23. The method of claim 20, wherein communicating an indication of the plurality of encoding symbol identifiers comprises: Communicating scheduling information via the control channel, the method further comprising: The plurality of encoding symbol identifiers are generated based at least in part on the scheduling information, wherein communicating the plurality of packets is based at least in part on the plurality of encoding symbol identifiers.

24. The method of claim 23, wherein the scheduling information comprises a position of one or more resource blocks, a system frame number, a time slot number, or a codeword number, and wherein generating the plurality of encoding codeword identifiers is based at least in part on the position of the one or more resource blocks, the system frame number, the time slot number, the codeword number, or a combination thereof.

25. The method of claim 20, further comprising: The communication includes control signaling indicating the source block number.

26. The method of claim 25, wherein the control signaling comprises: a downlink control information message comprising an indication of said source block number; a radio resource control message comprising an indication of the source block number; or a medium access control (MAC) control element message comprising an indication of the source block number.

27. The method of claim 25, wherein based at least in part on receiving the indication of the source block number, each packet in the plurality of packets does not include any indication of the source block number.

28. The method of claim 25, wherein communicating the control signaling including an indication of the source block number comprises: An indication of the source block number is received at a user device.

29. The method of claim 25, wherein communicating the control signaling including an indication of the source block number comprises: An indication of the source block number is sent from a base station.

30. The method of claim 20, wherein sending the plurality of packets comprises: sending a first transport block, wherein the first transport block comprises a plurality of first code blocks, the plurality of first code blocks comprise the plurality of packets, and wherein the plurality of packets comprise a plurality of first packets associated with a first redundancy version, the method further comprising: sending a second transport block, wherein the second transport block comprises a plurality of second code blocks, the plurality of second code blocks comprising a plurality of second packets associated with a second redundancy version; and An indication of a number of one or more second code blocks in the plurality of second code blocks is received, wherein the indication of the number indicates that the one or more second code blocks in the plurality of second code blocks could not be successfully decoded, wherein the plurality of first packets are sent based at least in part on receiving the indication of the number.

31. The method of claim 20, further comprising: An acknowledgement message is received based at least in part on sending the plurality of packets.

32. The method of claim 20, wherein each of the plurality of packets does not include any indication of the plurality of encoding symbol identifiers based at least in part on communicating an indication of the plurality of encoding symbol identifiers.

33. The method of claim 20, further comprising: A plurality of source symbols are encoded using a raptor code to generate the plurality of encoded symbols.

34. The method of claim 20, wherein communicating an indication of the plurality of encoding symbol identifiers comprises: An indication of the plurality of encoding symbol identifiers is received at a user equipment.

35. The method of claim 20, wherein communicating an indication of the plurality of encoding symbol identifiers comprises: An indication of the plurality of encoding symbol identifiers is sent from a base station.

36. An apparatus for wireless communication, comprising: processor; a memory coupled to the processor; as well as instructions stored in the memory and executable by the processor to cause the apparatus to: communicating, via the control channel, an indication of a plurality of encoding symbol identifiers for the encoding symbols; receiving, via a data channel, a plurality of packets associated with a rateless code, wherein each packet of the plurality of packets includes an encoding symbol; as well as The plurality of encoding symbols are decoded based at least in part on the plurality of encoding symbol identifiers.

37. The apparatus of claim 36, wherein the instructions to communicate an indication of the plurality of encoding symbol identifiers are executable by the processor to cause the apparatus to: Control signaling including an indication of the plurality of encoding symbol identifiers is communicated via the control channel.

38. The apparatus of claim 37, wherein the control signaling comprises: a downlink control information message comprising an indication of the plurality of encoding symbol identifiers; A radio resource control message comprising an indication of the plurality of encoding symbol identifiers; or a medium access control (MAC) control element message comprising an indication of the plurality of encoding symbol identifiers.

39. The apparatus of claim 36 , wherein the instructions to communicate an indication of the plurality of encoding symbol identifiers are executable by the processor to cause the apparatus to: communicate scheduling information via the control channel, and wherein the instructions are further executable by the processor to cause the apparatus to: The plurality of encoding symbol identifiers are generated based at least in part on the scheduling information.

40. The apparatus of claim 39, wherein the scheduling information comprises a position of one or more resource blocks, a system frame number, a time slot number, or a codeword number, and wherein generating the plurality of encoding codeword identifiers is based at least in part on the position of the one or more resource blocks, the system frame number, the time slot number, the codeword number, or a combination thereof.

41. The apparatus of claim 36, wherein the instructions are further executable by the processor to cause the apparatus to: The communication includes control signaling indicating the source block number.

42. The apparatus of claim 41, wherein decoding the plurality of encoding symbols is based at least in part on communicating an indication of the source block number.

43. The apparatus of claim 41 , wherein the control signaling comprises: a downlink control information message comprising an indication of said source block number; a radio resource control message comprising an indication of the source block number; or a medium access control (MAC) control element message comprising an indication of the source block number.

44. The apparatus of claim 41, wherein each packet in the plurality of packets does not include any indication of the source block number based at least in part on communicating the indication of the source block number.

45. The apparatus of claim 41 , wherein the instructions to communicate the control signaling including an indication of the source block number are executable by the processor to cause the apparatus to: An indication of the source block number is received at a user device.

46. ​​The apparatus of claim 41 , wherein the instructions to communicate the control signaling including an indication of the source block number are executable by the processor to cause the apparatus to: An indication of the source block number is sent from a base station.

47. The apparatus of claim 36 , wherein the instructions to receive the plurality of packets are executable by the processor to cause the apparatus to: receive a first transport block, wherein the first transport block comprises a plurality of first code blocks, the plurality of first code blocks comprising the plurality of packets, and wherein the plurality of packets comprises a plurality of first packets associated with a first redundancy version, and wherein the instructions are further executable by the processor to cause the apparatus to: receiving a second transport block, wherein the second transport block comprises a plurality of second code blocks including a plurality of second packets associated with a second redundancy version; and An indication of a number of the one or more second code blocks in the plurality of second code blocks is sent based at least in part on an inability to successfully decode the one or more second code blocks in the plurality of second code blocks, wherein the plurality of first packets are received based at least in part on sending the indication of the number.

48. The apparatus of claim 47, wherein each second code block of the plurality of second code blocks is associated with a corresponding first code block of the plurality of first code blocks, and wherein the instructions are further executable by the processor to cause the apparatus to: identifying a failure to decode a code block in the plurality of first code blocks that is not associated with any second code block in the plurality of second code blocks; and Based at least in part on identifying the failure and the generated plurality of encoding symbols, a soft combining process is performed using the plurality of first code blocks and the plurality of second code blocks, wherein decoding the plurality of first code blocks is based at least in part on performing the soft combining process.

49. The apparatus of claim 47, wherein each second code block of the plurality of second code blocks is associated with a corresponding first code block of the plurality of first code blocks, and wherein the instructions are further executable by the processor to cause the apparatus to: A code block of the plurality of first code blocks that is not associated with any second code block of the plurality of second code blocks is decoded, wherein decoding the plurality of first packets is based at least in part on decoding the code block that is not associated with any code block of the plurality of second code blocks.

50. The apparatus of claim 36, wherein the instructions are further executable by the processor to cause the apparatus to: An acknowledgement message is sent based at least in part on decoding the plurality of encoding symbols.

51. An apparatus according to claim 36, wherein each packet in the plurality of packets does not include any indication of the plurality of encoding symbol identifiers based at least in part on communicating an indication of the plurality of encoding symbol identifiers.

52. The apparatus of claim 36, wherein the instructions for decoding the plurality of encoding symbols are executable by the processor to cause the apparatus to: decode the plurality of encoding symbols according to a raptor code to generate a plurality of source symbols.

53. The apparatus of claim 36, wherein the instructions to communicate an indication of the plurality of encoding symbol identifiers are executable by the processor to cause the apparatus to: An indication of the plurality of encoding symbol identifiers is received at a user equipment.

54. The apparatus of claim 36, wherein the instructions to communicate an indication of the plurality of encoding symbol identifiers are executable by the processor to cause the apparatus to: An indication of the plurality of encoding symbol identifiers is sent from a base station.

55. An apparatus for wireless communication, comprising: processor; a memory coupled to the processor; as well as instructions stored in the memory and executable by the processor to cause the apparatus to: communicating, via the control channel, an indication of a plurality of encoding symbol identifiers for the encoding symbols; as well as A plurality of packets associated with the plurality of encoding symbol identifiers are transmitted via a data channel, wherein each packet of the plurality of packets includes encoding symbols for a rateless code.

56. The apparatus of claim 55, wherein the instructions to communicate an indication of the plurality of encoding symbol identifiers are executable by the processor to cause the apparatus to: Control signaling including an indication of the plurality of encoding symbol identifiers is communicated via the control channel.

57. The apparatus of claim 56, wherein the control signaling comprises: a downlink control information message comprising an indication of the plurality of encoding symbol identifiers; A radio resource control message comprising an indication of the plurality of encoding symbol identifiers; or a medium access control (MAC) control element message comprising an indication of the plurality of encoding symbol identifiers.

58. The apparatus of claim 55, wherein the instructions to communicate an indication of the plurality of encoding symbol identifiers are executable by the processor to cause the apparatus to: communicate scheduling information via the control channel, and wherein the instructions are further executable by the processor to cause the apparatus to: The plurality of encoding symbol identifiers are generated based at least in part on the scheduling information, wherein communicating the plurality of packets is based at least in part on the plurality of encoding symbol identifiers.

59. An apparatus according to claim 58, wherein the scheduling information includes the position of one or more resource blocks, the system frame number, the time slot number or the codeword number, and wherein the generation of the multiple encoding codeword identifiers is based at least in part on the position of the one or more resource blocks, the system frame number, the time slot number, the codeword number, or a combination thereof.

60. The apparatus of claim 55, wherein the instructions are further executable by the processor to cause the apparatus to: The communication includes control signaling indicating the source block number.

61. The apparatus of claim 60, wherein the control signaling comprises: a downlink control information message comprising an indication of said source block number; a radio resource control message comprising an indication of the source block number; or a medium access control (MAC) control element message comprising an indication of the source block number.

62. The apparatus of claim 60, wherein based at least in part on receiving the indication of the source block number, each packet in the plurality of packets does not include any indication of the source block number.

63. The apparatus of claim 60, wherein the instructions to communicate the control signaling including an indication of the source block number are executable by the processor to cause the apparatus to: An indication of the source block number is received at a user device.

64. The apparatus of claim 60, wherein the instructions to communicate the control signaling including an indication of the source block number are executable by the processor to cause the apparatus to: An indication of the source block number is sent from a base station.

65. The apparatus of claim 55, wherein the instructions to send the plurality of packets are executable by the processor to cause the apparatus to: send a first transport block, wherein the first transport block comprises a plurality of first code blocks, the plurality of first code blocks comprise the plurality of packets, and wherein the plurality of packets comprise a plurality of first packets associated with a first redundancy version, and wherein the instructions are further executable by the processor to cause the apparatus to: sending a second transport block, wherein the second transport block comprises a plurality of second code blocks, the plurality of second code blocks comprising a plurality of second packets associated with a second redundancy version; and An indication of a number of one or more second code blocks in the plurality of second code blocks is received, wherein the indication of the number indicates that the one or more second code blocks in the plurality of second code blocks could not be successfully decoded, wherein the plurality of first packets are sent based at least in part on receiving the indication of the number.

66. The apparatus of claim 55, wherein the instructions are further executable by the processor to cause the apparatus to: An acknowledgement message is received based at least in part on sending the plurality of packets.

67. An apparatus according to claim 55, wherein each packet in the plurality of packets does not include any indication of the plurality of encoding symbol identifiers based at least in part on communicating an indication of the plurality of encoding symbol identifiers.

68. The apparatus of claim 55, wherein the instructions are further executable by the processor to cause the apparatus to: A plurality of source symbols are encoded using a raptor code to generate the plurality of encoded symbols.

69. The apparatus of claim 55, wherein the instructions to communicate an indication of the plurality of encoding symbol identifiers are executable by the processor to cause the apparatus to: An indication of the plurality of encoding symbol identifiers is received at a user equipment.

70. The apparatus of claim 55, wherein the instructions to communicate an indication of the plurality of encoding symbol identifiers are executable by the processor to cause the apparatus to: An indication of the plurality of encoding symbol identifiers is sent from a base station.

71. An apparatus for wireless communication, comprising: means for communicating, via a control channel, an indication of a plurality of encoding symbol identifiers for the encoding symbols; means for receiving, via a data channel, a plurality of packets associated with a rateless code, wherein each packet of the plurality of packets comprises encoding symbols; as well as Means for decoding the plurality of encoding symbols based at least in part on the plurality of encoding symbol identifiers.

72. The apparatus of claim 71 , wherein the means for communicating an indication of the plurality of encoding symbol identifiers comprises: Means for communicating control signaling via the control channel including an indication of the plurality of encoding symbol identifiers.

73. The apparatus of claim 72, wherein the control signaling comprises: A downlink control information message comprising an indication of the plurality of encoding symbol identifiers; a radio resource control message comprising an indication of the plurality of encoding symbol identifiers; or a medium access control (MAC) control element message comprising an indication of the plurality of encoding symbol identifiers.

74. The apparatus of claim 71 , wherein communicating an indication of the plurality of encoding symbol identifiers comprises: communicating scheduling information via the control channel, the apparatus further comprising: Means for generating the plurality of encoding symbol identifiers based at least in part on the scheduling information.

75. An apparatus according to claim 74, wherein the scheduling information includes the position of one or more resource blocks, the system frame number, the time slot number or the codeword number, and wherein the generation of the multiple encoding codeword identifiers is at least partially based on the position of the one or more resource blocks, the system frame number, the time slot number, the codeword number, or a combination thereof.

76. The apparatus of claim 71 , further comprising: Means for communicating control signaling including an indication of a source block number.

77. An apparatus according to claim 76, wherein decoding the plurality of encoding symbols is based at least in part on communicating an indication of the source block number.

78. The apparatus of claim 76, wherein the control signaling comprises: a downlink control information message comprising an indication of said source block number; a radio resource control message comprising an indication of the source block number; or a medium access control (MAC) control element message comprising an indication of the source block number.

79. The apparatus of claim 76, wherein each packet in the plurality of packets does not include any indication of the source block number based at least in part on communicating the indication of the source block number.

80. The apparatus of claim 76, wherein the means for communicating the control signaling including an indication of the source block number comprises: Means for receiving, at a user device, an indication of the source block number.

81. The apparatus of claim 76, wherein the means for communicating the control signaling including an indication of the source block number comprises: Means for sending an indication of said source block number from a base station.

82. The apparatus of claim 71 , wherein receiving the plurality of packets comprises: receiving a first transport block, wherein the first transport block comprises a plurality of first code blocks, the plurality of first code blocks comprising the plurality of packets, and wherein the plurality of packets comprises a plurality of first packets associated with a first redundancy version, the apparatus further comprising: means for receiving a second transport block, wherein the second transport block comprises a plurality of second code blocks comprising a plurality of second packets associated with a second redundancy version; and means for sending an indication of a number of the one or more second code blocks in the plurality of second code blocks based at least in part on an inability to successfully decode the one or more second code blocks in the plurality of second code blocks, wherein the plurality of first packets are received based at least in part on sending the indication of the number.

83. The apparatus of claim 82, wherein each second code block of the plurality of second code blocks is associated with a corresponding first code block of the plurality of first code blocks, the apparatus further comprising: means for identifying a failure in decoding a code block of the plurality of first code blocks that is not associated with any second code block of the plurality of second code blocks; as well as means for performing a soft combining process using the plurality of first code blocks and the plurality of second code blocks based at least in part on identifying the failure and the generated plurality of encoding symbols, wherein decoding the plurality of first code blocks is based at least in part on performing the soft combining process.

84. The apparatus of claim 82, wherein each second code block of the plurality of second code blocks is associated with a corresponding first code block of the plurality of first code blocks, the apparatus further comprising: Means for decoding a code block of the plurality of first code blocks that is not associated with any second code block of the plurality of second code blocks, wherein decoding of the plurality of first packets is based at least in part on decoding the code block that is not associated with any code block of the plurality of second code blocks.

85. The apparatus of claim 71 , further comprising: Means for sending an acknowledgment message based at least in part on decoding the plurality of encoding symbols.

86. An apparatus according to claim 71, wherein each packet in the plurality of packets does not include any indication of the plurality of encoding symbol identifiers based at least in part on communicating an indication of the plurality of encoding symbol identifiers.

87. The apparatus of claim 71 , wherein the means for decoding the plurality of encoding symbols comprises: Means for performing decoding on the plurality of encoding symbols according to a raptor code to generate a plurality of source symbols.

88. The apparatus of claim 71 , wherein the means for communicating an indication of the plurality of encoding symbol identifiers comprises: Means for receiving, at a user equipment, an indication of the plurality of encoding symbol identifiers.

89. The apparatus of claim 71 , wherein the means for communicating an indication of the plurality of encoding symbol identifiers comprises: Means for transmitting, from a base station, an indication of the plurality of encoding symbol identifiers.

90. An apparatus for wireless communication, comprising: means for communicating, via a control channel, an indication of a plurality of encoding symbol identifiers for the encoding symbols; as well as Means for transmitting, via a data channel, a plurality of packets associated with the plurality of encoding symbol identifiers, wherein each packet in the plurality of packets comprises encoding symbols for a rateless code.

91. The apparatus of claim 90, wherein the means for communicating an indication of the plurality of encoding symbol identifiers comprises: Means for communicating control signaling via the control channel including an indication of the plurality of encoding symbol identifiers.

92. The apparatus of claim 91 , wherein the control signaling comprises: a downlink control information message comprising an indication of the plurality of encoding symbol identifiers; A radio resource control message comprising an indication of the plurality of encoding symbol identifiers; or a medium access control (MAC) control element message comprising an indication of the plurality of encoding symbol identifiers.

93. The apparatus of claim 90, wherein communicating an indication of the plurality of encoding symbol identifiers comprises: communicating scheduling information via the control channel, the apparatus further comprising: means for generating the plurality of encoding symbol identifiers based at least in part on the scheduling information, wherein communicating the plurality of packets is based at least in part on the plurality of encoding symbol identifiers.

94. An apparatus according to claim 93, wherein the scheduling information includes the position of one or more resource blocks, the system frame number, the time slot number or the codeword number, and wherein the generation of the multiple encoding codeword identifiers is at least partially based on the position of the one or more resource blocks, the system frame number, the time slot number, the codeword number, or a combination thereof.

95. The apparatus of claim 90, further comprising: Means for communicating control signaling including an indication of a source block number.

96. The apparatus of claim 95, wherein the control signaling comprises: a downlink control information message comprising an indication of said source block number; a radio resource control message comprising an indication of the source block number; or a medium access control (MAC) control element message comprising an indication of the source block number.

97. The apparatus of claim 95, wherein based at least in part on receiving an indication of the source block number, each packet in the plurality of packets does not include any indication of the source block number.

98. The apparatus of claim 95, wherein the means for communicating the control signaling including an indication of the source block number comprises: Means for receiving, at a user device, an indication of the source block number.

99. The apparatus of claim 95, wherein the means for communicating the control signaling including an indication of the source block number comprises: Means for sending an indication of said source block number from a base station.

100. The apparatus of claim 90, wherein transmitting the plurality of packets comprises: sending a first transport block, wherein the first transport block comprises a plurality of first code blocks, the plurality of first code blocks comprise the plurality of packets, and wherein the plurality of packets comprise a plurality of first packets associated with a first redundancy version, the apparatus further comprising: means for sending a second transport block, wherein the second transport block comprises a plurality of second code blocks comprising a plurality of second packets associated with a second redundancy version; and means for receiving an indication of a number of one or more second code blocks in the plurality of second code blocks, wherein the indication of the number indicates an failure to successfully decode the one or more second code blocks in the plurality of second code blocks, wherein the plurality of first packets are sent based at least in part on receiving the indication of the number.

101. The apparatus of claim 90, further comprising: Means for receiving an acknowledgment message based at least in part on transmitting the plurality of packets.

102. An apparatus according to claim 90, wherein each of the plurality of packets does not include any indication of the plurality of encoding symbol identifiers based at least in part on communicating an indication of the plurality of encoding symbol identifiers.

103. The apparatus of claim 90, further comprising: Means for encoding a plurality of source symbols using a raptor code to generate the plurality of encoded symbols.

104. The apparatus of claim 90, wherein the means for communicating an indication of the plurality of encoding symbol identifiers comprises: Means for receiving, at a user equipment, an indication of the plurality of encoding symbol identifiers.

105. The apparatus of claim 90, wherein the means for communicating an indication of the plurality of encoding symbol identifiers comprises: Means for transmitting, from a base station, an indication of the plurality of encoding symbol identifiers.

106. A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to: communicating, via the control channel, an indication of a plurality of encoding symbol identifiers for the encoding symbols; receiving, via a data channel, a plurality of packets associated with a rateless code, wherein each packet of the plurality of packets comprises a coding symbol; and The plurality of encoding symbols are decoded based at least in part on the plurality of encoding symbol identifiers.

107. The non-transitory computer-readable medium of claim 106, wherein the instructions to communicate an indication of the plurality of encoding symbol identifiers are executable by the processor to: Control signaling including an indication of the plurality of encoding symbol identifiers is communicated via the control channel.

108. The non-transitory computer-readable medium of claim 107, wherein the control signaling comprises: A downlink control information message comprising an indication of the plurality of encoding symbol identifiers; a radio resource control message comprising an indication of the plurality of encoding symbol identifiers; or a medium access control (MAC) control element message comprising an indication of the plurality of encoding symbol identifiers.

109. The non-transitory computer-readable medium of claim 106, wherein the instructions to communicate an indication of the plurality of encoding symbol identifiers are executable by the processor to: communicate scheduling information via the control channel, and wherein the instructions are executable by the processor to: The plurality of encoding symbol identifiers are generated based at least in part on the scheduling information.

110. A non-transitory computer-readable medium according to claim 109, wherein the scheduling information includes the position of one or more resource blocks, the system frame number, the time slot number or the codeword number, and wherein the generation of the multiple encoding codeword identifiers is based at least in part on the position of the one or more resource blocks, the system frame number, the time slot number, the codeword number, or a combination thereof.

111. The non-transitory computer-readable medium of claim 106, wherein the instructions are further executable by the processor to: The communication includes control signaling indicating the source block number.

112. The non-transitory computer-readable medium of claim 111, wherein decoding the plurality of encoding symbols is based at least in part on communicating an indication of the source block number.

113. The non-transitory computer-readable medium of claim 111, wherein the control signaling comprises: a downlink control information message comprising an indication of said source block number; a radio resource control message comprising an indication of the source block number; or a medium access control (MAC) control element message comprising an indication of the source block number.

114. The non-transitory computer-readable medium of claim 111, wherein based at least in part on communicating the indication of the source block number, each packet in the plurality of packets does not include any indication of the source block number.

115. The non-transitory computer-readable medium of claim 111, wherein the instructions to communicate the control signaling including an indication of the source block number are executable by the processor to: An indication of the source block number is received at a user device.

116. The non-transitory computer-readable medium of claim 111, wherein the instructions to communicate the control signaling including an indication of the source block number are executable by the processor to: An indication of the source block number is sent from a base station.

117. The non-transitory computer-readable medium of claim 106, wherein the instructions to receive the plurality of packets are executable by the processor to: receive a first transport block, wherein the first transport block comprises a plurality of first code blocks, the plurality of first code blocks comprising the plurality of packets, and wherein the plurality of packets comprises a plurality of first packets associated with a first redundancy version, and wherein the instructions are executable by the processor to: receiving a second transport block, wherein the second transport block comprises a plurality of second code blocks including a plurality of second packets associated with a second redundancy version; and An indication of a number of the one or more second code blocks in the plurality of second code blocks is sent based at least in part on an inability to successfully decode the one or more second code blocks in the plurality of second code blocks, wherein the plurality of first packets are received based at least in part on sending the indication of the number.

118. The non-transitory computer-readable medium of claim 117, wherein each second code block of the plurality of second code blocks is associated with a corresponding first code block of the plurality of first code blocks, and wherein the instructions are executable by the processor to: identifying a failure to decode a code block in the plurality of first code blocks that is not associated with any second code block in the plurality of second code blocks; and Based at least in part on identifying the failure and the generated plurality of encoding symbols, a soft combining process is performed using the plurality of first code blocks and the plurality of second code blocks, wherein decoding the plurality of first code blocks is based at least in part on performing the soft combining process.

119. The non-transitory computer-readable medium of claim 117, wherein each second code block of the plurality of second code blocks is associated with a corresponding first code block of the plurality of first code blocks, and wherein the instructions are further executable by the processor to: A code block of the plurality of first code blocks that is not associated with any second code block of the plurality of second code blocks is decoded, wherein decoding the plurality of first packets is based at least in part on decoding the code block that is not associated with any code block of the plurality of second code blocks.

120. The non-transitory computer-readable medium of claim 106, wherein the instructions are further executable by the processor to: An acknowledgement message is sent based at least in part on decoding the plurality of encoding symbols.

121. The non-transitory computer-readable medium of claim 106, wherein each of the plurality of packets does not include any indication of the plurality of encoding symbol identifiers based at least in part on communicating an indication of the plurality of encoding symbol identifiers.

122. The non-transitory computer-readable medium of claim 106, wherein the instructions for decoding the plurality of encoding symbols are executable by the processor to: perform decoding on the plurality of encoding symbols according to a raptor code to generate a plurality of source symbols.

123. The non-transitory computer-readable medium of claim 106, wherein the instructions to communicate an indication of the plurality of encoding symbol identifiers are executable by the processor to: An indication of the plurality of encoding symbol identifiers is received at a user equipment.

124. The non-transitory computer-readable medium of claim 106, wherein the instructions to communicate an indication of the plurality of encoding symbol identifiers are executable by the processor to: An indication of the plurality of encoding symbol identifiers is sent from a base station.

125. A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to: communicating, via the control channel, an indication of a plurality of encoding symbol identifiers for the encoding symbols; and A plurality of packets associated with the plurality of encoding symbol identifiers are transmitted via a data channel, wherein each packet of the plurality of packets includes encoding symbols for a rateless code.

126. The non-transitory computer-readable medium of claim 125, wherein the instructions to communicate an indication of the plurality of encoding symbol identifiers are executable by the processor to: Control signaling including an indication of the plurality of encoding symbol identifiers is communicated via the control channel.

127. The non-transitory computer-readable medium of claim 126, wherein the control signaling comprises: A downlink control information message comprising an indication of the plurality of encoding symbol identifiers; a radio resource control message comprising an indication of the plurality of encoding symbol identifiers; or a medium access control (MAC) control element message comprising an indication of the plurality of encoding symbol identifiers.

128. The non-transitory computer-readable medium of claim 125, wherein the instructions to communicate an indication of the plurality of encoding symbol identifiers are executable by the processor to: communicate scheduling information via the control channel, and wherein the instructions are executable by the processor to: The plurality of encoding symbol identifiers are generated based at least in part on the scheduling information, wherein communicating the plurality of packets is based at least in part on the plurality of encoding symbol identifiers.

129. A non-transitory computer-readable medium according to claim 128, wherein the scheduling information includes the position of one or more resource blocks, the system frame number, the time slot number or the codeword number, and wherein the generation of the multiple encoding codeword identifiers is at least partially based on the position of the one or more resource blocks, the system frame number, the time slot number, the codeword number, or a combination thereof.

130. The non-transitory computer-readable medium of claim 125, wherein the instructions are further executable by the processor to: The communication includes control signaling indicating the source block number.

131. The non-transitory computer-readable medium of claim 130, wherein the control signaling comprises: a downlink control information message comprising an indication of said source block number; a radio resource control message comprising an indication of the source block number; or a medium access control (MAC) control element message comprising an indication of the source block number.

132. The non-transitory computer-readable medium of claim 130, wherein based at least in part on receiving an indication of the source block number, each packet in the plurality of packets does not include any indication of the source block number.

133. The non-transitory computer-readable medium of claim 130, wherein the instructions to communicate the control signaling including an indication of the source block number are executable by the processor to: An indication of the source block number is received at a user device.

134. The non-transitory computer-readable medium of claim 130, wherein the instructions to communicate the control signaling including an indication of the source block number are executable by the processor to: An indication of the source block number is sent from a base station.

135. The non-transitory computer-readable medium of claim 125, wherein the instructions to send the plurality of packets are executable by the processor to: send a first transport block, wherein the first transport block comprises a plurality of first code blocks, the plurality of first code blocks comprise the plurality of packets, and wherein the plurality of packets comprise a plurality of first packets associated with a first redundancy version, and wherein the instructions are executable by the processor to: sending a second transport block, wherein the second transport block comprises a plurality of second code blocks, the plurality of second code blocks comprising a plurality of second packets associated with a second redundancy version; and An indication of a number of one or more second code blocks in the plurality of second code blocks is received, wherein the indication of the number indicates that the one or more second code blocks in the plurality of second code blocks could not be successfully decoded, wherein the plurality of first packets are sent based at least in part on receiving the indication of the number.

136. The non-transitory computer-readable medium of claim 125, wherein the instructions are further executable by the processor to: An acknowledgement message is received based at least in part on sending the plurality of packets.

137. The non-transitory computer-readable medium of claim 125, wherein each of the plurality of packets does not include any indication of the plurality of encoding symbol identifiers based at least in part on communicating an indication of the plurality of encoding symbol identifiers.

138. The non-transitory computer-readable medium of claim 125, wherein the instructions are further executable by the processor to: A plurality of source symbols are encoded using a raptor code to generate the plurality of encoded symbols.

139. The non-transitory computer-readable medium of claim 125, wherein the instructions to communicate an indication of the plurality of encoding symbol identifiers are executable by the processor to: An indication of the plurality of encoding symbol identifiers is received at a user equipment.

140. The non-transitory computer-readable medium of claim 125, wherein the instructions to communicate an indication of the plurality of encoding symbol identifiers are executable by the processor to: An indication of the plurality of encoding symbol identifiers is sent from a base station.

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