Dynamic encoding for wireless systems

Abstract

Methods, systems, and devices for wireless communications are described. A method for dynamically mapping coded packets may include: a base station identifying a set of coded packets from a set of source packets. The base station may use different coding rates to map subsets of the coded packets to first and second sets of resources. In some examples, the base station may schedule one or more resources from the second set of resources for receiving feedback from one or more user equipments (UEs). In some examples, the base station may identify a second set of coded packets from a second set of source packets and may map the second set of coded packets to the second set of resources and a third set of resources. The UE may recover the first or second set of source packets based on the coded packets sent by the base station.

Description

Technical Field

[0001] The following relates generally to wireless communications and, more particularly, to dynamic encoding for wireless systems. Background Art

[0002] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcasting, 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, improved LTE (LTE-A) systems, or LTE-A Pro systems) and fifth generation (5G) systems (which may be referred to as new radio (NR) systems). These systems may 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 for multiple communication devices (which may be further referred to as user equipment (UE)).

[0003] Some wireless communication systems may support broadcast services (e.g., multicast broadcast services (MBS)) in which a transmitting device (e.g., a network node, a base station, etc.) broadcasts one or more coded packets to one or more receiving devices (e.g., UEs). In some cases, the transmitting device may broadcast the coded packets without receiving an indication of whether the coded packets have been successfully or unsuccessfully decoded by the receiving device. Consequently, the transmitting device may broadcast a complete set of coded packets, regardless of how many packets were successfully decoded by the receiving device, which may result in inefficient use of network resources. Summary of the Invention

[0004] The described techniques relate to improved methods, systems, devices, and apparatus for supporting dynamic coding for wireless systems. Generally, the described techniques provide for dynamically mapping coded packets to resources associated with a broadcast or multicast channel associated with a given service, such as a multicast broadcast service (MBS). Some examples may include a base station identifying coded packets or encoding a source packet set, and mapping a first subset of coded packets to a first set of resources and a second subset of coded packets to a second set of resources. In some examples, the base station may use different coding rates (which may be associated with different channel conditions) to map the first and second subsets of coded packets. In some examples, the base station may schedule one or more resources from the second set of resources for receiving feedback from one or more user equipment (UEs) subscribing to the service. In some examples, the base station may identify a second set of coded packets from a second set of source packets. The base station may map a first subset of the second set of coded packets to one or more resources from the second set of resources, and may map a second subset of the second set of coded packets to a third set of resources. Dynamically mapping coded packets to resources may allow wireless communication systems to improve the reliability of communication services.

[0005] A method of wireless communication at a base station is described. The method may include identifying a set of coded packets associated with a multicast service channel, the set of coded packets corresponding to a set of source packets encoded based on a set of network coding parameters; mapping a first subset of the set of coded packets onto a first set of resources based on a first set of resources of the multicast service channel being associated with a first coding rate greater than a threshold coding rate; mapping a second subset of the set of coded packets onto a second set of resources based on a second set of resources of the multicast service channel being associated with a second coding rate less than the threshold coding rate; and transmitting the first subset of the set of coded packets using the first set of resources and transmitting the second subset of the set of coded packets using the second set of resources.

[0006] An apparatus for wireless communication at a base station is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to: identify a set of coded packets associated with a multicast service channel, the set of coded packets corresponding to a set of source packets encoded based on a set of network coding parameters; map a first subset of the set of coded packets onto a first set of resources based on a first set of resources of the multicast service channel being associated with a first coding rate greater than a threshold coding rate; map a second subset of the set of coded packets onto a second set of resources based on a second set of resources of the multicast service channel being associated with a second coding rate less than the threshold coding rate; and send the first subset of the set of coded packets using the first set of resources and send the second subset of the set of coded packets using the second set of resources.

[0007] Another apparatus for wireless communication at a base station is described. The apparatus may include means for identifying a set of coded packets associated with a multicast service channel, the set of coded packets corresponding to a set of source packets encoded based on a set of network coding parameters; mapping a first subset of the set of coded packets onto a first set of resources based on a first set of resources of the multicast service channel being associated with a first coding rate greater than a threshold coding rate; mapping a second subset of the set of coded packets onto a second set of resources based on a second set of resources of the multicast service channel being associated with a second coding rate less than the threshold coding rate; and transmitting the first subset of the set of coded packets using the first set of resources and transmitting the second subset of the set of coded packets using the second set of resources.

[0008] A non-transitory computer-readable medium storing code for wireless communication at a base station is described. The code may include instructions executable by a processor to: identify a set of coded packets associated with a multicast service channel, the coded packet set corresponding to a set of source packets encoded based on a set of network coding parameters; map a first subset of the set of coded packets onto a first set of resources based on a first set of resources of the multicast service channel being associated with a first coding rate greater than a threshold coding rate; map a second subset of the set of coded packets onto a second set of resources based on a second set of resources of the multicast service channel being associated with a second coding rate less than the threshold coding rate; and transmit the first subset of the set of coded packets using the first set of resources and transmit the second subset of the set of coded packets using the second set of resources.

[0009] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for mapping a first subset of the coded set of packets to a first set of symbols for a first time slot period; and mapping a second subset of the coded set of packets to a second set of symbols for a second time slot period that is temporally subsequent to the first time slot period.

[0010] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for determining a threshold number of coded packets, wherein a first subset of the set of coded packets corresponds to a first number of coded packets that is below the threshold number of coded packets, and a second subset of the set of coded packets corresponds to a second number of coded packets that is above the threshold number of coded packets.

[0011] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for determining a channel quality of a multicast service channel, the channel quality corresponding to at least one UE supported by a base station, and determining a threshold number of coded packets based on the channel quality.

[0012] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following operations: determining a number of UEs capable of decoding a set of coded packets based on channel quality, wherein the threshold number of coded packets may be determined based on the number of UEs capable of decoding the set of coded packets.

[0013] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a threshold number of encoded packets can be determined based on an ability of a threshold percentage of user equipment (UEs) in a set of user equipment (UEs) associated with a multicast service channel to recover a source set of packets based on the transmitted first and second subsets.

[0014] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following operations: scheduling at least one feedback channel for a set of user equipment (UEs) associated with a multicast service channel in one or more resources of a second resource set; and monitoring feedback information from the set of UEs via the one or more resources.

[0015] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, monitoring feedback information may include operations, features, units, or instructions for receiving a negative acknowledgement message associated with a first subset of the coded set of packets from at least one UE in the set of UEs.

[0016] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, means, or instructions for sending a second subset of the coded set of packets to at least one UE in the set of UEs based on the negative acknowledgement message.

[0017] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following operations: determining, based on monitoring, that there is no feedback information from any UE in the UE set; and sending, to the UE set, a second coded set of packets corresponding to a second source set of packets based on determining that there is no feedback information.

[0018] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the monitoring feedback information may include operations, features, units, or instructions for receiving, from at least one UE in a set of UEs, an indication of a difference between a number of coded packets used to decode a source set of packets and a number of a first subset of the set of coded packets received by the at least one UE.

[0019] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following operations: determining to stop transmission of coded packets corresponding to the set of coded packets based on the difference and the number of negative acknowledgment messages received from the set of UEs; and sending a second set of coded packets corresponding to the second set of source packets to the set of UEs based on the determination to stop transmission.

[0020] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for: identifying a second set of coded packets corresponding to a second set of source packets encoded based on a second set of network coding parameters; mapping a first portion of the second set of coded packets onto one or more resources; and sending the first portion of the second set of coded packets using the one or more resources.

[0021] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a first subset and a second subset of a set of coded packets may be sent to a first group of user equipment (UEs), and a first portion of the second set of coded packets may be sent to a second group of UEs that is different from the first group of UEs, the second group of UEs being associated with a higher channel quality than the first group of UEs.

[0022] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a first portion of a second set of coded packets may be sent on a frequency band different from the first subset and the second subset, and one or more resources at least partially overlap in time with the second set of resources.

[0023] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first portion of the second set of encoded packets may be associated with a service other than a multicast service channel.

[0024] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for mapping a second portion of the second set of coded packets onto a third set of resources; and sending the second portion of the second set of coded packets using the third set of resources.

[0025] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for determining a threshold number of groupings associated with a first set of resources and a second set of resources; and determining a third set of resources based on the threshold number of groupings.

[0026] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the set of network coding parameters corresponds to a fountain code. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 An example of a wireless communication system supporting dynamic encoding for the wireless system in accordance with aspects of the present disclosure is shown.

[0028] Figure 2 An example of a wireless communication system supporting dynamic encoding for the wireless system in accordance with aspects of the present disclosure is shown.

[0029] Figure 3 An example of a resource allocation scheme supporting dynamic coding for a wireless system in accordance with aspects of the present disclosure is shown.

[0030] Figure 4An example of a resource allocation scheme supporting dynamic coding for a wireless system in accordance with aspects of the present disclosure is shown.

[0031] Figure 5 An example of a resource allocation scheme supporting dynamic coding for a wireless system in accordance with aspects of the present disclosure is shown.

[0032] Figure 6 An example of a process flow supporting dynamic encoding for a wireless system in accordance with aspects of the present disclosure is shown.

[0033] Figure 7 An example of a process flow supporting dynamic encoding for a wireless system in accordance with aspects of the present disclosure is shown.

[0034] Figure 8 An example of a process flow supporting dynamic encoding for a wireless system in accordance with aspects of the present disclosure is shown.

[0035] Figure 9 and 10 A block diagram illustrating a device supporting dynamic encoding for a wireless system in accordance with aspects of the present disclosure is shown.

[0036] Figure 11 A block diagram illustrating a communication manager supporting dynamic encoding for a wireless system in accordance with aspects of the present disclosure is shown.

[0037] Figure 12 A diagram illustrating a system including devices supporting dynamic encoding for a wireless system in accordance with aspects of the present disclosure.

[0038] Figures 13 to 16 A flow chart illustrating a method of supporting dynamic encoding for a wireless system in accordance with aspects of the present disclosure is shown. DETAILED DESCRIPTION

[0039] Some wireless communication systems may support broadcast services (e.g., multicast broadcast services (MBS)), in which a transmitting device (e.g., a network node, a base station, etc.) broadcasts one or more packets to one or more receiving devices (e.g., a user equipment (UE)). In some cases, a rateless code (fountain code, Luby transform (LT) code, Raptor code, etc.) may be used to encode one or more packets from a source packet set. A rateless code may not have an inherent code rate and may therefore be used to generate coded packets indefinitely from a source packet set. If the number of coded packets received is greater than the number of source packets, the receiving device may recover the source packet set from the coded packet set.

[0040] In some cases, the transmitting device can broadcast the coded packets without receiving the indication that the coded packets have been successfully (or unsuccessfully) decoded by the receiving device. Accordingly, the transmitting device can broadcast a complete set of coded packets or a default number of coded packets, regardless of how many packets the receiving device has successfully decoded. Therefore, each receiving device can decode the transmission and obtain different numbers of successfully received packets, so that the receiving device experiencing high channel quality can successfully decode the transmission before the receiving device with low channel quality (which can attempt to decode more coded packets of the transmission to successfully decode and obtain the source packets). However, the broadcast service may not support the use of precoding technology, and therefore, the efficiency of the transmission at each receiving device may decrease. Additionally or alternatively, due to lost or damaged packets, the decoding of the rateless code may be suspended, which may result in the increase of the coded packet quantity for successfully recovering the source data packet set. Therefore, it may be beneficial to dynamically map the coded packets to the resource so that the UEs of a threshold percentage (e.g., majority) associated with the broadcast service can successfully decode the broadcast packets.

[0041] Some techniques for dynamically mapping coded packets may include: the base station identifying a set of coded packets associated with an MBS service. In some examples, identifying the set of coded packets may include encoding the source set of packets using a set of network coding parameters (e.g., using a rateless code). The base station may map the set of coded packets onto channel resources for transmission. In some examples, the base station may map a first subset of the set of coded packets to a first set of resources, the first subset including a number of packets below a threshold number or associated with a coding rate below a threshold coding rate. In some implementations, the base station may determine a channel quality associated with one or more UEs subscribed to the MBS service. The base station may determine a threshold based on the channel quality such that a number of UEs (e.g., a threshold percentage, such as 50%, 70%, 90%, 100%, or a threshold number of UEs) are able to successfully decode the transmission using the first subset of coded packets. The base station may map a second subset of the set of coded packets onto a second set of resources. In some implementations, the first subset and the second subset of the set of coded packets may include the entire set of coded packets. In some examples, the base station may map a first subset of coded packets using a first coding rate and map a second subset of coded packets using a second, lower coding rate.In some implementations, a resource set may include a symbol, a time slot, a plurality of time slots, or any combination thereof.

[0042] Additionally or alternatively, the base station may schedule one or more resources in the second set of resources for receiving feedback from the UE. Thus, the base station may receive feedback from the UE using resources in the second set of resources. In some examples, the base station may receive a negative acknowledgement (NACK) from one or more of the UEs indicating that the transmission was not successfully decoded. In such an example, the base station may continue to send coded packets until the base station receives a positive acknowledgement (ACK) for the transmission from the UE, which in some cases may correspond to the base station not receiving feedback information at all. In some implementations, the base station may receive, along with the NACK message, an indication of the number of additional coded packets that the UE can utilize to decode the transmission. For example, if the base station sends M number of packets, the UE may successfully receive N number of packets, and the UE may report M–N packets to indicate to the base station a request to transmit M–N additional packets for successful decoding by the UE.

[0043] Additionally or alternatively, the base station may identify a coded set of packets associated with a second source set of packets. The base station may map a portion of the second coded set of packets to one or more resources in the second set of resources. In some examples, the base station may interleave a portion of the second set of coded packets with a second subset of the first set of coded packets, such that the resources of the second set of coded packets alternate with the resources of the first set of coded packets. In some examples, the base station may map a portion of the second set of coded packets based on a first threshold, which may correspond to the threshold coding rate or number of UEs described above. The base station may map a second portion of the second set of coded packets to a third set of resources based on a second threshold. In some examples, the base station may determine the second threshold based on an estimate that a majority of UEs subscribing to the MBS service will be able to successfully decode the first set of coded packets.

[0044] Certain aspects of the subject matter described herein can be implemented to achieve one or more of the following potential advantages. The techniques employed by the described wireless communication system can provide benefits and enhancements to the operation of the wireless communication system. For example, the described techniques can include features that improve the reliability of communications by dynamically mapping coded packets to resources based on channel quality indicators measured at a base station. The described techniques include additional features for improving resource usage, power consumption and battery life, data rates, and other benefits.

[0045] Various aspects of the present disclosure are first described in the context of a wireless communication system. Aspects of the present disclosure are further described in the context of a resource allocation scheme and process flow. Aspects of the present disclosure are further illustrated and described with reference to apparatus diagrams, system diagrams, and flow charts related to dynamic coding for a wireless system.

[0046] Figure 1 An example of a wireless communication system 100 supporting dynamic coding for a wireless system according to aspects of the present disclosure is shown. The wireless communication system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an Advanced LTE (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some examples, the wireless communication system 100 may support enhanced broadband communication, ultra-reliable (e.g., mission-critical) communication, low-latency communication, communication with low-cost and low-complexity devices, or any combination thereof.

[0047] 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 transmission of signals according to one or more radio access technologies.

[0048] The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary, mobile, or both at different times. The UEs 115 may be devices of different forms or with different capabilities. Figure 1 1. Some example UEs 115 are shown in FIG. The UEs 115 described herein are 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 As shown in .

[0049] The base stations 105 can communicate with the core network 130, or communicate with each other, or perform both operations described above. 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 directly (e.g., directly between the base stations 105) or indirectly (e.g., via the core network 130) via the backhaul links 120 (e.g., via X2, Xn, or other interfaces), or perform both operations described above. In some examples, the backhaul links 120 can be or include one or more wireless links.

[0050] One or more of the base stations 105 described herein may include or may be referred to by those skilled in the art as a base station transceiver, a radio base station, an access point, a radio transceiver, a Node B, an evolved Node B (eNB), a next generation Node B, or a Gigabit Node B (any of which may be referred to as a gNB), a Home Node B, a Home evolved Node B, or some other appropriate terminology.

[0051] 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 appropriate 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, etc., which may be implemented in various items such as appliances, vehicles, meters, etc.

[0052] The UE 115 described herein is 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 As shown in .

[0053] The UE 115 and the base station 105 can wirelessly communicate with each other via one or more communication links 125 on one or more carriers. The term "carrier" can refer to a collection of radio frequency spectrum resources with a defined physical layer structure for supporting the communication link 125. For example, a carrier used 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 operation for the carrier, user data, or other signaling. The wireless communication system 100 can support communication with the UE 115 using carrier aggregation or multi-carrier operation. Depending on the carrier aggregation configuration, the UE 115 can be configured with multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation can be used with both frequency division duplex (FDD) component carriers and time division duplex (TDD) component carriers.

[0054] In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling to coordinate operations with respect to other carriers. A carrier may be associated with a frequency channel (e.g., an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute Radio Frequency Channel Number (EARFCN)) and may be placed according to a channel grid to be discovered by a UE 115. A carrier may operate in a standalone mode, where initial acquisition and connection is performed by the UE 115 via the carrier, or in a non-standalone mode, where the connection is anchored using a different carrier (e.g., of the same or different radio access technology).

[0055] The communication link 125 shown in the wireless communication system 100 may include an uplink transmission from the UE 115 to the base station 105, or a downlink transmission from the base station 105 to the UE 115. A carrier may carry downlink or uplink communications (e.g., in FDD mode) or may be configured to carry both downlink and uplink communications (e.g., in TDD mode).

[0056] A carrier may be associated with a particular bandwidth of radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as the "system bandwidth" of the carrier or wireless communication system 100. For example, the carrier bandwidth may be one of a plurality of determined bandwidths of a carrier for a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)). A device of the wireless communication system 100 (e.g., a base station 105, a UE 115, or both) may have a hardware configuration that supports communication on a particular carrier bandwidth, or may be configurable to support communication on one of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 or a UE 115 that supports simultaneous communication via carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured to operate on a portion (e.g., a subband, a BWP) or all of the carrier bandwidth.

[0057] The signal waveform transmitted on the carrier 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 comprise 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 for the UE 115 may be. Wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers may further increase the data rate or data integrity for communications with the UE 115.

[0058] One or more numerologies for a carrier may be supported, where the numerology may include a subcarrier spacing (Δf) and a cyclic prefix. A carrier may be divided into one or more BWPs having the same or different numerologies. In some examples, a UE 115 may be configured with multiple BWPs. In some examples, a single BWP may be active for a carrier at a given time, and communications for the UE 115 may be limited to the one or more active BWPs.

[0059] The basic time unit (which may be referred to as 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 time intervals for base station 105 or UE 115 may be expressed as multiples of a maximum supported discrete Fourier transform (DFT) size. The time intervals of communication resources may be organized according to radio frames, each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0060] Each frame may include multiple consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, the frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into multiple 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 multiple symbol periods (e.g., depending on the length of the cyclic prefix added in front of each symbol period). In some wireless communication systems 100, the time slots may be further divided into multiple mini-slots containing one or more symbols. Excluding the cyclic prefix, each symbol 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.

[0061] 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 the form of bursts of shortened TTIs (sTTIs)).

[0062] Physical channels may be multiplexed onto a carrier according to various techniques. For example, physical control channels and physical data channels may be multiplexed onto a downlink carrier using one or more of a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique. A control region (e.g., a control resource set (CORESET)) for a physical control channel may be defined by a number of symbol periods and may extend across 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 of 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 having 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 .

[0063] Each base station 105 can provide communication coverage via one or more cells (e.g., macro cells, small cells, hot spots or other types of cells, or any combination thereof). The term "cell" can refer to a logical communication entity used to communicate with the base station 105 (e.g., via a carrier), and can be associated with an identifier (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID), or other identifier) ​​for distinguishing adjacent cells. In some examples, a cell can also refer to a geographic coverage area 110 or a portion of a geographic coverage area 110 (e.g., a sector) on which the logical communication entity operates. Depending on various factors (such as the capabilities of the base station 105), the scope of such a cell can range from a smaller area (e.g., a building, a subset of a building) to a larger area. For example, a cell can be or include a building, a subset of a building, or an external space between or overlapping the geographic coverage area 110, etc.

[0064] A macro cell typically covers a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access by UEs 115 with a service subscription to a network provider that supports the macro cell. Small cells may be associated with lower-power base stations 105 than macro cells, and may operate in the same or different (e.g., licensed, unlicensed) frequency bands than macro cells. Small cells may provide unrestricted access to UEs 115 with a service subscription to a network provider, or may provide restricted access to UEs 115 associated with the small cell (e.g., UEs 115 in a closed subscriber group (CSG), UEs 115 associated with users in a home or office). A base station 105 may support one or more cells and may also support communication on one or more cells using one or more component carriers.

[0065] In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB)) that may provide access to different types of devices.

[0066] In some examples, base station 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 use the same or different radio access technologies to provide coverage for various geographic coverage areas 110.

[0067] The wireless communication system 100 can support synchronous or asynchronous operation. For synchronous operation, the base stations 105 can have similar frame timing, and transmissions from different base stations 105 can be approximately aligned in time. For asynchronous operation, the base stations 105 can have different frame timing, and in some examples, transmissions from different base stations 105 may not be aligned in time. The techniques described herein can be used for either synchronous or asynchronous operation.

[0068] Some UEs 115 (e.g., MTC or IoT devices) may be low-cost or low-complexity devices and may provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC may refer to data communication technology that allows devices to communicate with each other or base station 105 without human intervention. In some examples, M2M communication or MTC may include communication from devices that incorporate sensors or meters to measure or capture information and relay such information to a central server or application that utilizes or presents the information to a human interacting with the application. Some UEs 115 may be designed to collect information or implement automated behavior of machines or other equipment. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, climate and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based service billing.

[0069] Some UEs 115 may be configured to employ a mode of operation that reduces power consumption, such as half-duplex communication (e.g., a mode that supports one-way communication via transmission or reception rather than simultaneous transmission and reception). In some examples, half-duplex communication may be performed at a reduced peak rate. Other power conservation techniques for UEs 115 include entering a power-saving deep sleep mode when not engaged in active communications, operating over a limited bandwidth (e.g., according to narrowband communication), or a combination of these techniques. For example, some UEs 115 may be configured to operate using a narrowband protocol type associated with a defined portion or range (e.g., a set of subcarriers or resource blocks (RBs)) within a carrier, within a guard band of a carrier, or outside a carrier.

[0070] 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 can be used interchangeably in this article.

[0071] In some examples, UE 115 can also 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 can be within the geographic coverage area 110 of base station 105. Other UEs 115 in such a group can be outside the geographic coverage area 110 of base station 105 or otherwise unable to receive transmissions from base station 105. In some examples, groups of UEs 115 communicating via D2D communication can 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 scheduling of resources for D2D communication. In other cases, D2D communication is performed between UEs 115 without involving base station 105.

[0072] In some systems, the D2D communication link 135 can be an example of a communication channel (such as a sidelink communication channel) between vehicles (e.g., UE 115). In some examples, the vehicles can communicate using vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination thereof. The vehicles can signal information related to traffic conditions, signal scheduling, weather, safety, emergency situations, or any other information related to the V2X system. In some examples, vehicles in the V2X system can communicate with roadside infrastructure (such as roadside units) or communicate with the network via one or more network nodes (e.g., base station 105) using vehicle-to-network (V2N) communication, or both.

[0073] 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), which may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function unit (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 unit (UPF)) that routes packets to or interconnects to an external network. The control plane entity 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 transmitted through the user plane entity, which may provide IP address allocation and other functions. The user plane entity may be connected to the network operator IP service 150. IP services 150 may include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0074] Some of the network devices (e.g., 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 the 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).

[0075] 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). The region from 300 MHz to 3 GHz is often referred to as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length. UHF waves can be blocked or redirected by buildings and environmental features, but the waves can penetrate buildings sufficiently for a macrocell to provide service to a UE 115 located indoors. Transmission using UHF waves can be associated with smaller antennas and shorter distances (e.g., less than 100 kilometers) compared to transmission using the lower frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0076] The wireless communication system 100 may also operate in the super high frequency (SHF) region using frequency bands from 3 GHz to 30 GHz (also known as centimeter bands) or in the extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) (also known as millimeter bands). In some examples, the wireless communication system 100 may support millimeter wave (mmW) communications between the UE 115 and the base station 105, and the EHF antennas of the corresponding devices may be smaller and more closely spaced than UHF antennas. In some examples, this may facilitate the use of antenna arrays within the device. However, the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and shorter distances than SHF or UHF transmissions. The techniques disclosed herein may be employed across transmissions using one or more different frequency regions, and the designated use of frequency bands spanning these frequency regions may vary by country or regulatory agency.

[0077] The wireless communication system 100 can utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 can employ license assisted access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band (such as the 5 GHz industrial, scientific, and medical (ISM) band). When operating in an unlicensed radio frequency spectrum band, devices (such as base stations 105 and UEs 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 (e.g., LAA) in combination with component carriers operating in the licensed band. Operations in the unlicensed spectrum can include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, etc.

[0078] The base station 105 or UE 115 may be equipped with multiple antennas that may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of the base station 105 or UE 115 may be located within one or more antenna arrays or antenna panels (which may 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 that the base station 105 may use to support beamforming for communications with the UE 115, the antenna array having a number of rows and columns of antenna ports. Similarly, the UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals transmitted via the antenna ports.

[0079] The base station 105 or UE 115 can use MIMO communication to take advantage of multipath signal propagation and improve spectral efficiency by sending or receiving multiple signals via different spatial layers. Such a technique may be referred to as spatial multiplexing. For example, a transmitting device may send multiple signals via different antennas or different combinations of antennas. Similarly, a receiving device may receive multiple signals via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO) (where multiple spatial layers are sent to the same receiving device) and multi-user MIMO (MU-MIMO) (where multiple spatial layers are sent to multiple devices).

[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 and 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 can be achieved by combining signals transmitted via antenna elements of an antenna array so that some signals propagating at a particular orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals transmitted via antenna elements can include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to signals carried via antenna elements associated with the device. Adjustments associated with each of the antenna elements can be defined by a set of beamforming weights associated with a particular orientation (e.g., relative to the antenna array of the transmitting device or the receiving device, or relative to some other orientation).

[0081] As part of the beamforming operation, the base station 105 or the UE 115 can use beam scanning techniques. For example, the base station 105 can use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with the UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) can be sent multiple times by the base station 105 in different directions. For example, the base station 105 can transmit signals according to different sets of beamforming weights associated with different transmission directions. The transmissions in different beam directions can be used (e.g., by a transmitting device (such as the base station 105) or by a receiving device (such as the UE 115)) to identify the beam direction for subsequent transmission or reception by the base station 105.

[0082] Some signals (e.g., data signals associated with a particular receiving device) may be transmitted by base station 105 in a single beam direction (e.g., a direction associated with the receiving device (e.g., UE 115)). In some examples, the beam direction associated with transmissions along the single beam direction may be determined based on signals transmitted in one or more beam directions. For example, UE 115 may receive one or more of the signals transmitted by base station 105 in different directions and may report to base station 105 an indication of the signal received by UE 115 having the highest signal quality or otherwise acceptable signal quality.

[0083] In some examples, transmissions by a device (e.g., by a base station 105 or a UE 115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from the base station 105 to the UE 115). The UE 115 may report feedback indicating precoding weights used for one or more beam directions, and the feedback may correspond to a configured number of beams across the system bandwidth or one or more subbands. The base station 105 may send reference signals (e.g., cell-specific reference signals (CRS), channel state information reference signals (CSI-RS)) that may be precoded or not precoded. The UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook). Although these techniques are described with reference to signals sent by base station 105 in one or more directions, UE 115 may employ similar techniques to send signals multiple times in different directions (e.g., to identify a beam direction for subsequent transmission or reception by UE 115) or to send signals in a single direction (e.g., to send data to a receiving device).

[0084] When receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from the base station 105, the receiving device (e.g., UE 115) can try multiple reception configurations (e.g., directional listening). For example, the receiving device can try multiple reception directions by receiving via different antenna subarrays, by processing the received signal according to different antenna subarrays, by receiving according to different sets of receive beamforming weights applied to the signal received at multiple antenna elements of the antenna array (e.g., different sets of directional listening weights), or by processing the received signal according to different sets of receive beamforming weights applied to the signal received at multiple antenna elements of the antenna array (any of the above operations can be referred to as "listening" according to different reception configurations or reception directions). In some examples, the receiving device can use a single reception configuration to receive along a single beam direction (e.g., when receiving a data signal). A single receive configuration may be aligned on a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio (SNR), or otherwise acceptable signal quality based on listening according to multiple beam directions).

[0085] The wireless communication system 100 can be a packet-based network operating according to a layered protocol stack. In the user plane, the communication at the bearer or packet data convergence protocol (PDCP) layer can be IP-based. The radio link control (RLC) layer can perform packet segmentation and reassembly for transmission on the logical channel. The medium access control (MAC) layer can perform priority handling and multiplexing of logical channels to 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 the RRC connection between the UE 115 and the base station 105 or the core network 130 to support radio bearers for user plane data. At the physical layer, transport channels can be mapped to physical channels.

[0086] 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 for increasing the likelihood that data is correctly received 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 conditions). In some examples, a device can support HARQ feedback for the same time slot, wherein the device can provide HARQ feedback for data received in previous symbols in a particular time slot in that time slot. In other cases, the device can provide HARQ feedback in subsequent time slots or according to some other time interval.

[0087] In some examples, the wireless communication system 100 can support an MBS communication service, wherein a transmitting device (e.g., a base station 105, a UE 115, an integrated access and backhaul (IAB) network node, an IAB relay node, etc.) transmits coded packets to one or more UEs 115. In some implementations, the transmitting device can encode packets from a set of source packets using a rateless code (e.g., a fountain code, a LT code, a Rhythm code, etc.). A rateless code may not have an inherent coding rate and can therefore be used to generate coded packets from a set of source packets indefinitely. If a receiving device (e.g., a UE 115) receives a greater number of coded packets than the number of source packets, the receiving device can recover the source packets. If multiple UEs 115 subscribe to a broadcast service, each UE 115 can receive and decode a different number of coded packets due to, for example, differences in channel quality between the UEs 115. Therefore, a UE 115 experiencing high channel quality can recover the source packets before a UE 115 experiencing low channel quality. However, in some cases, base station 105 may be operating using radio link control (RLC) unacknowledged mode (RLC-UM), in which base station 105 does not receive feedback from UE 115 indicating whether UE 115 successfully or unsuccessfully recovered the source packets. Therefore, base station 105 may send the complete set of encoded packets regardless of how many packets UE 115 successfully decoded.

[0088] In order to improve the reliability of communication or adjust the number of coded packets sent by base station 105, base station 105 can dynamically map the coded packets to resources associated with the broadcast channel. For example, base station 105 can map a first subset of coded packets to a first set of resources using a first coding rate, and map a second subset of coded packets to a second set of resources using a second, lower coding rate. Thus, a UE 115 experiencing high channel quality can use the first subset of coded packets to recover the source packets, while a UE 115 experiencing low channel quality can use the first and second subsets of coded packets to recover the source packets. Additionally or alternatively, base station 105 can schedule resources for feedback messages so that UE 115 can report acknowledgement / negative acknowledgement (ACK / NACK) or the number of additional packets with which UE 115 can recover the source packets. Additionally or alternatively, the base station 105 can interleave resources of the first set of coded packets with resources associated with the second set of coded packets so that UEs 115 experiencing high channel quality can begin recovering the second set of source packets while UEs 115 experiencing low channel quality continue recovering the first set of source packets. Dynamically mapping coded packets onto resources associated with a broadcast channel can allow the wireless communication system 100 to improve the reliability of communication services and use resources efficiently.

[0089] Figure 2An example of a wireless communication system 200 that supports dynamic coding for a wireless system according to one or more aspects of the present disclosure is shown. In some examples, the wireless communication system 200 can implement one or more aspects of the wireless communication system 100. The wireless communication system 200 can include UE 115-a, UE 115-b, and UE 115-c, which can be as described with reference to FIG. Figure 1 The wireless communication system 200 may also include a base station 105-a, which may be as described with reference to Figure 1 An example of a base station 105 is depicted. Base station 105-a may be associated with a cell having a coverage area 110-a that provides wireless communication service.

[0090] The wireless communication system 200 may support network coding techniques. For example, the transmitting device 205 may use one or more network coding techniques to encode a set of K source packets 220. For example, the transmitting device 205 may use a rateless code (e.g., a fountain code, a LT code, a Rhythm code, etc.) to encode the K source packets 220. Encoding the K source packets 220 may generate a set of N coded packets 225, which the transmitting device 205 may send to one or more receiving devices 215 (e.g., UEs 115-a, 115-b, and 115-c). The receiving device may receive a set of L coded packets 230. In some examples, L may be less than or equal to N, based on, for example, the channel conditions experienced by the receiving device 215. If L is greater than K, that is, if the set of L coded packets 230 is greater than the set of K source packets 220, the receiving device 215 may successfully recover the set of source packets 220.

[0091] In some examples, the wireless communication system 200 can support MBS communication services, in which a base station 105-a (which can be an example of a transmitting device 205) sends coded packets to UEs 115-a, 115-b, and 115-c (which can be examples of a receiving device 215). In some examples, the base station 105-a can operate in RLC-UM, in which the base station 105-a sends the coded packets without receiving feedback from the UE 115-a, 115-b, or 115-c indicating whether the UE 115-a, 115-b, or 115-c successfully recovered the source packets. Therefore, the base station 105-a can send a complete set of coded packets. The UEs 115-a, 115-b, and 115-c can use different numbers of coded packets to recover the source packets based on the channel conditions experienced by each UE 115. That is, if the number of successfully received packets is greater than the number of source packets (K), each of UE 115-a, 115-b, and 115-c may successfully decode the source packets, but if the number of successfully received packets is less than the number of source packets (K), the source packets may not be successfully decoded. In such a case, depending on channel conditions and decoding success, some UEs 115 may successfully decode the transmitted packets, while other UEs may not successfully decode the transmitted packets.

[0092] To improve the reliability of communication, the base station 105-a may dynamically map the coded packets to channel resources. For example, the base station 105-a may map a first subset of coded packets to a first set of resources 235 and a second subset of coded packets to a second set of resources 240 associated with a broadcast channel (e.g., a physical broadcast channel (PBCH)). The base station 105-a may map the first set of resources 235 using a first coding rate and map the second set of resources 240 using a second, lower coding rate. In some implementations, the second coding rate may be half the first coding rate. Accordingly, the UEs 115-a, 115-b, and 115-c may receive some or all of the coded packets mapped to the resource sets 235 and 240. For example, the UE 115-a may receive the first subset of coded packets on the first set of resources 235 and recover the source packets. In some examples, the UE 115-a may use the third set of resources 245 to receive transmissions associated with different services. For example, UE 115-a can monitor a third resource set 245, which can occur during the same period as the second resource set 240 but can use a different frequency band. UE 115-a can use the third resource set 245 to receive a second coded packet set (which can be associated with a second source packet set different from the first source packet set). Therefore, UE 115-a can experience a high data rate by receiving the second coded packet set and obtaining a second source packet set different from the first source packet set. UE 115-b can use the first resource set 235 to receive a first coded packet subset and may fail to recover the source packets. Accordingly, UE 115-b can use the second resource set 240 to receive a second coded packet subset and can successfully recover the source packets. Therefore, UE 115-b can experience high reliability associated with the communication service. The number of coded packets received and decoded by UE 115-a, 115-b, and 115-c can be based on the channel conditions experienced by each UE 115.

[0093] Additionally or alternatively, the base station 105-a may schedule resources to receive feedback on the second set of resources 240. The base station 105-a may receive feedback from any of the UEs 115-a, 115-b, or 115-c that failed to successfully recover the source packet using the first coded subset of packets sent on the first set of resources 235. For example, the UE 115-c may fail to successfully recover the source packet using the first coded subset of packets received using the first set of resources 235. Accordingly, the UE 115-c may use one or more resources from the second set of resources 240 to send a feedback message to the base station 105-a. In some examples, the UE 115-c may send a NACK message to the base station 105-a indicating that the UE 115-c failed to recover the source packet. The UE 115-c may also send an indication to the base station 105-a of a number of additional packets that the UE 115-c may use to recover the source packet. Based on the feedback sent from the UE 115 - c , the base station 105 - a may determine whether to send additional coded packets using the third set of resources 245 or to send a new set of coded packets corresponding to the new set of source packets.

[0094] Additionally or alternatively, base station 105-a may identify a second set of coded packets associated with a second set of source packets. Base station 105-a may map a first subset of the second set of coded packets to one or more resources associated with second set of resources 235. For example, base station 105-a may interleave packets from the second set of coded packets with packets from the first set of coded resources such that resources associated with the first set of coded packets alternate with resources associated with the second set of coded packets. Base station 105-a may also map a second subset of the second set of coded packets to third set of resources 245. Thus, UEs 115-a, 115-b, and 115-c may receive coded packets based on whether UEs 115-a, 115-b, and 115-c have recovered the first set of source packets, the second set of source packets, or both. For example, UE 115-a may receive coded packets on first set of resources 235 and may successfully recover the associated source packets. UE 115-a may use second set of resources 240 to receive coded packets associated with the second set of coded packets, so that UE 115-a may begin to recover the second set of source packets. Similarly, UE 115-b may receive coded packets from the first set of coded packets on first set of resources 235 and may fail to recover the first set of source packets. Therefore, UE 115-b may use second set of resources 240 to receive coded packets from the first set of coded packets and may recover the first set of source packets. UE 115-b may receive coded packets from the second set of coded packets on third set of resources 245 and may recover the second set of source packets. Based on channel conditions, UE 115-c may exhibit behavior similar to that of UEs 115-a and 115-b. Dynamically mapping coded packets to resources associated with a broadcast channel may allow wireless communication system 200 to improve the reliability of communication services and use resources efficiently.

[0095] Figure 3 An example of a resource allocation scheme 300 supporting dynamic coding for a wireless system according to one or more aspects of the present disclosure is shown. In some examples, the resource allocation scheme 300 may be implemented as described with reference to Figure 1 and 2 In some examples, the resource allocation scheme 300 may be implemented as described with reference to Figure 1 The described base station 105, one or more UEs 115, or any combination thereof may be implemented. Resource allocation scheme 300 may be an example of a resource allocation scheme used by base station 105 to dynamically map encoded packets for broadcast transmission.

[0096] Base station 105 can pass the encoded packets P1 to PS to the first set of resources 305. For example, the base station 105 may map packet P1 to resource 305-a, packet P2 to resource 305-b, packet P3 to resource 305-c, and so on, until packet P is mapped to resource 305-c. S In some examples, the base station 105 may use a first coding rate to map the encoded packets onto the first set of resources 305. The number of packets S may correspond to a threshold 315, where the threshold 315 is determined based on channel conditions associated with one or more UEs 115.

[0097] Base station 105 may use a second, lower coding rate to encode the encoded packet P S+1 to P N to the second resource set 310. For example, the base station 105 may map the group P S+1 Mapped to resources 310-a and 310-b, group P S+2 Mapped to resources 310-c and 310-d, and so on, until the packet P N Mapped to resources 310 - e and 310 - f.

[0098] Thus, UE 115 may receive the first subset of packets, the second subset of packets, or both to recover the set of source packets associated with the coded packets. In some examples, the number of coded packets used by UE 115 to recover the source packets may be based on the channel conditions experienced by the UE. In some implementations, resources 305 and 310 may be examples of symbols, time slots, frames, or any combination thereof.

[0099] In some examples, packets P1 to P N It may be associated with a first service (eg, service A), which may be an MBS service to which the UE set subscribes. Packets P1 to P S UE 115 that has obtained the source packet set (e.g., a UE 115 with relatively good channel quality (e.g., channel quality above a threshold)) can monitor the second service (e.g., service B) during the time when the base station transmits the second resource set 310. For example, UE 115 can monitor the third resource set 315 (which can be associated with a different MBS service or a non-MBS service or a different carrier or subcarrier) to decode and follow packets P1 to P2. NIn some implementations, the UE 115 may monitor a third set of resources 315 (which may be indicated by the base station 105) during the same time period as the second set of resources 310 but on a different frequency band. That is, one or more UEs 115 may monitor the third set of resources 315 to detect the encoded packets P. M To P X Decode, P M To P X may correspond to a new set of source packets during a duration that at least partially overlaps with the second set of resources 310. This may allow UEs 115 with higher channel quality to have higher throughput by receiving source packets associated with services A and B, while allowing UEs 115 with lower channel quality to have additional resources for successfully decoding source packets associated with service A. In some examples, UE 115 may fail to use coded packets P1 through P2. S to decode the source packets associated with service A, but it is possible to use the encoded packets P S+1 To P N 15 to successfully decode the source packets associated with service A. Thus, after successfully decoding the source packets associated with service A, UE 115 may monitor the coded packets P using a different frequency band. M To P X to attempt to decode source packets associated with a second set of source packets (e.g., Service B source packets), which may allow UE 115 to experience higher data throughput.

[0100] Figure 4 An example of a resource allocation scheme 400 supporting dynamic coding for a wireless system according to one or more aspects of the present disclosure is shown. In some examples, the resource allocation scheme 400 may be implemented as described with reference to Figure 1-3 In some examples, the resource allocation scheme 400 may be implemented as described with reference to the wireless communication system 100 or 200, the resource allocation scheme 300, or any combination thereof. Figure 1 The described base station 105, one or more UEs 115, or any combination thereof may be implemented. Resource allocation scheme 400 may be an example of a resource allocation scheme used by base station 105 to dynamically map encoded packets for broadcast transmission.

[0101] Base station 105 can pass the encoded packets P1 to P S to the first set of resources 405. For example, the base station 105 may map packet P1 to resource 405-a, packet P2 to resource 405-b, packet P3 to resource 405-c, and so on, until all packets P are mapped to resource 405-a.S The number of packets S may correspond to a threshold 415 , where the threshold 415 is determined based on channel conditions associated with one or more UEs 115 .

[0102] The base station 105 may transmit the coded packet P S+1 to P N to the second resource set 410. For example, the base station 105 may map the group P S+1 Mapped to resource 410-b, group P S+2 Mapped to resource 410-c, group P S+2 Mapped to resource 410-d, and so on, until the packet P N The base station 105 may schedule the feedback 420 on one or more resources from the second set of resources. For example, the base station 105 may schedule the feedback 420-a on the resource 410-a and the feedback 420-b on the resource 410-e.

[0103] Thus, UE 115 may receive the first subset of packets, the second subset of packets, or both to recover the set of source packets associated with the encoded packet. UE 115 may indicate feedback information to base station 105, the feedback information comprising an ACK / NACK message, an indication of the number of additional packets, or any combination thereof. Base station 105 may receive feedback information (such as a NACK message) from one or more UEs and may determine to use the second set of resources to send packets until packet 420-b. In some cases, base station 105 may not receive any feedback messages and may determine that all UEs 115 have used packets P1 to P2. S The source packet set is successfully recovered, and the use of the second resource set 410 to send the packet P can be avoided. S+1 to P N In this case, the base station 105 may send packets P1 to P SIn an example where the base station 105 receives an indication of a number of packets received by one or more UEs 115 or a difference between the number of packets successfully decoded by the UE 115 and the number of packets decoded by the UE 115, the base station 105 may determine whether to transmit using the second set of resources 410 or to avoid transmitting. For example, if the difference between the number of packets successfully decoded by the UE 115 and the number of packets decoded by the UE 115 is above a threshold difference, or the number of UEs 115 that sent NACKs is below a threshold number, the base station 105 may avoid transmitting packets using the second set of resources 410. Alternatively, if the difference between the number of packets successfully decoded by the UE 115 and the number of packets decoded by the UE 115 is below a threshold difference, or the number of UEs 115 that sent NACKs is above a threshold number, the base station 105 may transmit packets using the second set of resources 410.

[0104] In some examples, the number of coded packets used by UE 115 to recover the source packet can be based on the channel conditions experienced by the UE.In some implementations, resources 405 and 410 can be examples of symbols, time slots, frames, or any combination thereof.

[0105] Figure 5 An example of a resource allocation scheme 500 supporting dynamic coding for a wireless system according to one or more aspects of the present disclosure is shown. In some examples, the resource allocation scheme 500 may be implemented as described with reference to Figure 1-4 In some examples, the resource allocation scheme 500 may be implemented as described with reference to the wireless communication system 100 or 200, the resource allocation 300 or 400, or any combination thereof. Figure 1 The described base station 105, one or more UEs 115, or any combination thereof may be implemented. Resource allocation scheme 500 may be an example of a resource allocation scheme used by base station 105 to dynamically map encoded packets for broadcast transmission.

[0106] The base station may map a first subset of the first set of coded packets to a first set of resources 505. For example, the base station may map packet X from the first set of coded packets to resources 505-a, 505-b, 505-c, and 505-d. In some examples, the number of coded packets may correspond to a first threshold 520-a determined based on channel conditions associated with one or more UEs 115.

[0107] The base station may map the second subset of the first set of coded packets and the first subset of the second set of coded packets to a second set of resources 510. For example, the base station may map packet X from the first set of coded packets to resource 510-a, packet X+1 from the second set of coded packets to resource 510-b, packet X from the first set of coded packets to resource 510-c, and packet X+1 from the second set of coded packets to resource 510-d. In some examples, the number of packets associated with the second set of resources 510 may correspond to a second threshold 520-b.

[0108] The base station may map a second subset of the second set of coded packets onto a third set of resources 515. For example, the base station 105 may map packet set X+1 onto resources 515-a, 515-b, 515-c, and 515-b.

[0109] Therefore, UE 115 can receive the first packet subset, the second packet subset, or both to recover the source packet set associated with the coded packet. UE 115 can use the second or third resource set to receive the second coded packet set to recover the second source packet set. In some examples, the number of coded packets used by UE 115 to recover the source packets can be based on the channel conditions experienced by the UE. In some implementations, resources 405 and 410 can be examples of symbols, time slots, frames, or any combination thereof.

[0110] Figure 6 An example of a process flow 600 for supporting dynamic encoding for a wireless system according to one or more aspects of the present disclosure is shown. In some examples, the process flow 600 may be implemented as described with reference to Figure 1-5

[0046] The process flow 600 may include aspects of the wireless communication system 100 or 200, the resource allocation scheme 300, 400, or 500, or any combination thereof, as described herein. The process flow 600 may include a UE 115-d, a UE 115-e, and a base station 105-b, which may be examples of corresponding devices described herein. Alternative examples below may be implemented in which some of the processes are performed in a different order than described or not performed at all. In some implementations, the processes may include additional features not mentioned below, or additional processes may be added.

[0111] At 605, base station 105-b may identify a set of coded packets. In some examples, the coded packets may be encoded using a set of network coding parameters. For example, base station 105-b may encode the set of source packets using a rateless code (e.g., a fountain code, a LT code, a Athlon code, etc.).

[0112] At 610, base station 105-b may map a first subset of the set of coded packets onto a first set of resources. In some examples, the first subset of coded packets may have a number of packets corresponding to a threshold determined by base station 105-b. In some examples, base station 105-b may determine the threshold based on channel conditions associated with UE 115-d and UE 115-e. In some implementations, base station 105-b may determine the threshold based on an estimate that a majority of UEs 115 subscribed to the broadcast service will be able to recover the source packets. Base station 105-b may map the first subset of coded packets using a first coding rate.

[0113] At 615, base station 105-b may map a second subset of the set of coded packets onto a second set of resources. In some examples, the second subset of coded packets may include all packets in the set of coded packets that are not included in the first subset. Base station 105-b may map the second subset of coded packets using a second coding rate that is lower than the first coding rate. For example, base station 105-b may use twice as many resources for each packet in the second subset of packets as for the first subset of packets.

[0114] At 620, base station 105-b may send the coded packets to UE 115-d and UE 115-e in a multicast transmission. UE 115-d and UE 115-e may then attempt to recover the source packets using one or more of the transmitted coded packets. In some examples, if UE 115-e successfully recovers the source packets using the first subset of packets, UE 115-e may use the second set of resources to receive new data or transmissions associated with a different broadcast service.

[0115] Implementing various aspects of process flow 600 may allow base station 105 - b to dynamically map encoded packets onto channel resources, thereby improving the reliability and efficiency of broadcast services.

[0116] Figure 7 An example of a process flow 700 for supporting dynamic encoding for a wireless system according to one or more aspects of the present disclosure is shown. In some examples, the process flow 700 may be implemented as described with reference to Figure 1-6

[0066] The present invention relates to aspects of the wireless communication system 100 or 200, the resource allocation scheme 300, 400, or 500, the process flow 600, or any combination thereof. The process flow 700 may include a UE 115-f, a UE 115-g, and a base station 105-c, which may be examples of corresponding devices described herein. Alternative examples below may be implemented in which some of the processes are performed in a different order than described or not performed at all. In some implementations, the processes may include additional features not mentioned below, or additional processes may be added.

[0117] At 705, the base station 105-c may identify a set of coded packets. In some examples, the coded packets may be encoded using a set of network coding parameters. For example, the base station 105-c may encode the set of source packets using a rateless code (e.g., a fountain code, a LT code, a Rhino code, etc.).

[0118] At 710, base station 105-c may map the coded sets of packets onto channel resources. Base station 105-c may map a first subset of coded packets onto a first set of resources and a second subset of coded packets onto a second set of resources. In some examples, the number of packets mapped to the first and second sets of resources may correspond to a threshold determined by base station 105-c. In some examples, base station 105-c may determine the threshold based on channel conditions associated with UE 115-d and UE 115-e. In some implementations, base station 105-c may determine the threshold based on an estimate that a majority of UEs 115 subscribed to the broadcast service will be able to recover the source packets.

[0119] At 715 , the base station 105 - c may schedule one or more resources from the second set of resources for receiving feedback from the UEs 115 - f and 115 - g .

[0120] At 720 , the base station 105 - c may use the first and second sets of resources to send the encoded packet in a multicast message to the UEs 115 - f and 115 - g .

[0121] At 725 and 730, UEs 115-f and 115-g may send feedback messages to base station 105-c. In some examples, the feedback messages may include ACK or NACK messages for the packets sent. The feedback messages may also include an indication of the number of coded packets with which UE 115 will be able to recover the source packet. For example, if UE 115g fails to recover the source packet using the first and second coded packet subsets, UE 115-g may indicate the number of additional packets required to recover the source packet.

[0122] Implementing various aspects of process flow 700 may allow the base station 105 - c to dynamically map encoded packets onto channel resources, thereby improving the reliability and efficiency of broadcast services.

[0123] Figure 8 An example of a process flow 800 for supporting dynamic encoding for a wireless system according to one or more aspects of the present disclosure is shown. In some examples, the process flow 800 may be implemented as described with reference to Figure 1-7

[0066] The present invention relates to aspects of the wireless communication system 100 or 200, the resource allocation scheme 300, 400, or 500, the process flow 600 or 700, or any combination thereof. The process flow 800 may include a UE 115-h, a UE 115-i, and a base station 105-d, which may be examples of corresponding devices described herein. Alternative examples below may be implemented in which some of the processes are performed in a different order than described or not performed at all. In some implementations, the processes may include additional features not mentioned below, or additional processes may be added.

[0124] At 805, base station 105-d may identify a first set of coded packets. In some examples, the coded packets may be encoded using a set of network coding parameters. For example, base station 105-d may encode the first set of source packets using a rateless code (e.g., a fountain code, a LT code, a Rhino code, etc.).

[0125] At 810, base station 105-d may map the first set of coded packets to a set of channel resources. For example, base station 105-d may map the first subset of coded packets to a first set of resources and the second subset of coded packets to a second set of resources based on a first predetermined threshold. In some examples, base station 105-c may determine the first threshold based on channel conditions associated with UE 115-i and UE 115-e. In some implementations, base station 105-d may determine the threshold based on an estimate that a majority of UEs 115 subscribed to the broadcast service will be able to recover the source packets.

[0126] At 815, base station 105-d may identify a second set of coded packets. In some examples, the coded packets may be encoded using a set of network coding parameters. For example, base station 105-d may encode the second set of source packets using a rateless code (e.g., a fountain code, a LT code, a Rhino code, etc.).

[0127] At 820, base station 105-d may map the second set of coded packets to resources. For example, base station 105-d may map a first subset of the second set of coded packets to a second set of resources such that resources associated with the second set of coded packets alternate with resources associated with the first set of coded packets. Base station 105-d may also map a second subset of the second set of coded packets to a third set of resources based on a second predetermined threshold. In some examples, base station 105-d may determine the second threshold using a process similar to that used to determine the first threshold.

[0128] At 825, base station 105-d may transmit the first and second sets of coded packets using the first, second, and third sets of resources. Thus, UEs 115-h and 115-i may receive the first and second sets of coded packets and recover the first and second sets of source packets. In some examples, if UE 115-h experiences a higher channel quality than UE 115-i, UE 115-h may recover the source packets using a smaller number of coded packets than UE 115-i. Thus, while UE 115-i attempts to recover the first set of source packets, UE 115-h may receive new data associated with the second set of source packets.

[0129] Implementing various aspects of process flow 800 may allow the base station 105 - c to dynamically map encoded packets onto channel resources, thereby improving the reliability and efficiency of broadcast services.

[0130] Figure 9 A block diagram 900 illustrates a device 905 that supports dynamic coding for a wireless system according to aspects of the present disclosure. The device 905 can be an example of aspects of a base station 105 as described herein. The device 905 can include a receiver 910, a communication manager 915, and a transmitter 920. The device 905 can also include a processor. Each of these components can communicate with each other (e.g., via one or more buses).

[0131] The receiver 910 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to dynamic coding for wireless systems, etc.). The information may be passed to other components of the device 905. The receiver 910 may be a reference Figure 12 Examples of aspects of the transceiver 1220 are described. The receiver 910 may utilize a single antenna or a collection of antennas.

[0132] The communication manager 915 can perform the following operations: identifying a set of coded packets associated with a multicast service channel, the coded packet set corresponding to a set of source packets encoded based on a set of network coding parameters; mapping a first subset of the coded packet set to a first set of resources based on a first set of resources of the multicast service channel being associated with a first coding rate greater than a threshold coding rate; mapping a second subset of the coded packet set to a second set of resources based on a second set of resources of the multicast service channel being associated with a second coding rate less than the threshold coding rate; and sending the first subset of the coded packet set using the first set of resources and sending the second subset of the coded packet set using the second set of resources. The communication manager 915 can be an example of aspects of the communication manager 1210 described herein.

[0133] The communication manager 915 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 915 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, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described in this disclosure.

[0134] The communication manager 915 or its subcomponents can be physically located at various locations, including being distributed so that portions of the functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the communication manager 915 or its subcomponents can be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 915 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).

[0135] The transmitter 920 may transmit signals generated by other components of the device 905. In some examples, the transmitter 920 may be co-located with the receiver 910 in a transceiver module. For example, the transmitter 920 may be a reference Figure 12 Examples of aspects of the transceiver 1220 are described. The transmitter 920 may utilize a single antenna or a collection of antennas.

[0136] In some examples, the communication manager 915 can be implemented as an integrated circuit or chipset for a mobile device modem, and the receiver 910 and transmitter 920 can be implemented as analog components (e.g., amplifiers, filters, antennas) coupled with the mobile device modem to enable wireless transmission and reception on one or more frequency bands.

[0137] The communication manager 915 as described can be implemented to achieve one or more potential advantages. One implementation can allow the device 605 to dynamically map the encoded packets to resources associated with the broadcast channel. Based on the techniques for dynamically mapping the encoded packets, the device 605 can support adjusting the number of transmitted packets so that the receiving device can successfully recover the data. As a result, the device 605 can exhibit improved reliability or reduced resource usage, among other benefits.

[0138] Figure 10 A block diagram 1000 illustrates a device 1005 that supports dynamic coding for a wireless system according to aspects of the present disclosure. The device 1005 may be an example of aspects of the device 905 or base station 105 as described herein. The device 1005 may include a receiver 1010, a communication manager 1015, and a transmitter 1040. The device 1005 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0139] The receiver 1010 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to dynamic coding for wireless systems, etc.). The information may be communicated to other components of the device 1005. The receiver 1010 may be a reference Figure 12 Examples of various aspects of the transceiver 1220 are described. The receiver 1010 may utilize a single antenna or a collection of antennas.

[0140] The communication manager 1015 can be an example of aspects of the communication manager 915 as described herein. The communication manager 1015 can include an encoded packet identifier 1020, a first packet mapping component 1025, a second packet mapping component 1030, and a packet transmitter 1035. The communication manager 1015 can be an example of aspects of the communication manager 1210 described herein.

[0141] The coded packet identifier 1020 may identify a set of coded packets associated with a multicast service channel, the set of coded packets corresponding to a set of source packets encoded based on a set of network coding parameters.

[0142] The first packet mapping component 1025 can map the first subset of the set of coded packets onto the first set of resources based on the first set of resources of the multicast service channel being associated with a first coding rate greater than a threshold coding rate.

[0143] The second packet mapping component 1030 can map a second subset of the set of coded packets onto a second set of resources based on the second set of resources of the multicast service channel being associated with a second coding rate that is less than a threshold coding rate.

[0144] The packet transmitter 1035 may send a first subset of the coded set of packets using a first set of resources and a second subset of the coded set of packets using a second set of resources.

[0145] The transmitter 1040 may transmit signals generated by other components of the device 1005. In some examples, the transmitter 1040 may be co-located with the receiver 1010 in a transceiver module. For example, the transmitter 1040 may be a reference Figure 12 Examples of various aspects of the transceiver 1220 are described. The transmitter 1040 may utilize a single antenna or a collection of antennas.

[0146] Figure 11 A block diagram 1100 illustrates a communication manager 1105 that supports dynamic coding for a wireless system in accordance with aspects of the present disclosure. The communication manager 1105 can be an example of aspects of the communication manager 915, the communication manager 1015, or the communication manager 1210 described herein. The communication manager 1105 can include a coded packet identifier 1110, a first packet mapping component 1115, a second packet mapping component 1120, a packet transmitter 1125, a threshold manager 1130, a channel quality manager 1135, a feedback scheduler 1140, and a feedback monitor 1145. Each of these modules can communicate with each other directly or indirectly (e.g., via one or more buses).

[0147] The coded packet identifier 1110 may identify a set of coded packets associated with a multicast service channel, the set of coded packets corresponding to a set of source packets encoded based on a set of network coding parameters.

[0148] In some examples, the coded packet identifier 1110 may identify a second set of coded packets corresponding to a second set of source packets encoded based on a second set of network coding parameters.

[0149] In some cases, the set of network coding parameters corresponds to a fountain code.

[0150] The first packet mapping component 1115 can map the first subset of the set of coded packets onto the first set of resources based on the first set of resources of the multicast service channel being associated with a first coding rate greater than a threshold coding rate.

[0151] In some examples, the first packet mapping component 1115 can map a first subset of the set of encoded packets to a first set of symbols for a first time slot period.

[0152] In some examples, first packet mapping component 1115 can map the first portion of the second set of encoded packets onto one or more resources.

[0153] The second packet mapping component 1120 can map a second subset of the set of coded packets onto a second set of resources based on the second set of resources of the multicast service channel being associated with a second coding rate that is less than a threshold coding rate.

[0154] In some examples, the second packet mapping component 1120 can map a second subset of the set of encoded packets to a second set of symbols in a second time slot period that is temporally subsequent to the first time slot period.

[0155] In some examples, second packet mapping component 1120 can map a second portion of the second set of coded packets onto a third set of resources.

[0156] The packet transmitter 1125 may send a first subset of the coded set of packets using a first set of resources and a second subset of the coded set of packets using a second set of resources.

[0157] In some examples, packet transmitter 1125 may send a second subset of the encoded set of packets to at least one UE in the set of UEs based on the negative acknowledgement message.

[0158] In some examples, packet transmitter 1125 may send a second set of coded packets corresponding to a second set of source packets to the set of UEs based on determining that feedback information is absent.

[0159] In some examples, the packet transmitter 1125 may determine to cease transmission of coded packets corresponding to the set of coded packets based on the difference and the number of negative acknowledgement messages received from the set of UEs.

[0160] In some examples, packet transmitter 1125 may send a second set of coded packets corresponding to a second set of source packets to the set of UEs based on determining to cease transmission.

[0161] In some examples, packet transmitter 1125 may use one or more resources to send a first portion of a second set of encoded packets.

[0162] In some examples, packet transmitter 1125 may use a third set of resources to send a second portion of a second set of coded packets.

[0163] In some cases, the first and second subsets of the set of coded packets are sent to a first group of user equipments (UEs).

[0164] In some cases, the first portion of the second set of coded packets is sent to a second group of UEs that is different from the first group of UEs, the second group of UEs being associated with a higher channel quality than the first group of UEs.

[0165] In some cases, the first portion of the second set of coded packets is sent on a different frequency band than the first subset and the second subset.

[0166] In some cases, one or more resources at least partially overlap in time with the second set of resources.

[0167] In some cases, the first portion of the second set of encoded packets is associated with a service other than a multicast service channel.

[0168] The threshold manager 1130 may determine a threshold number of coded packets, wherein a first subset of the set of coded packets corresponds to a first number of coded packets that is below the threshold number of coded packets, and a second subset of the set of coded packets corresponds to a second number of coded packets that is above the threshold number of coded packets.

[0169] In some examples, threshold manager 1130 may determine the threshold number of coded packets based on channel quality.

[0170] In some examples, the threshold manager 1130 may determine a number of UEs capable of decoding the set of coded packets based on channel quality, wherein the threshold number of coded packets is determined based on the number of UEs capable of decoding the set of coded packets.

[0171] In some examples, threshold manager 1130 may determine a threshold number of packets associated with the first set of resources and the second set of resources.

[0172] In some examples, threshold manager 1130 may determine the third set of resources based on a threshold number of packets.

[0173] In some cases, the threshold number of encoded packets is determined based on an ability of a threshold percentage of a set of user equipment (UEs) associated with the multicast service channel to recover the set of source packets from the transmitted first and second subsets.

[0174] The channel quality manager 1135 may determine a channel quality of a multicast service channel, the channel quality corresponding to at least one UE supported by the base station.

[0175] The feedback scheduler 1140 may schedule at least one feedback channel for a set of user equipments (UEs) associated with the multicast service channel in one or more resources of the second set of resources.

[0176] Feedback monitor 1145 may monitor feedback information from a set of UEs via one or more resources.

[0177] In some examples, feedback monitor 1145 may receive a negative acknowledgement message associated with the first subset of the set of encoded packets from at least one UE in the set of UEs.

[0178] In some examples, the feedback monitor 1145 may determine, based on monitoring, that there is no feedback information from any UE in the set of UEs.

[0179] In some examples, feedback monitor 1145 may receive, from at least one UE in the set of UEs, an indication of a difference between the number of coded packets used to decode the source set of packets and the number of the first subset of the set of coded packets received by the at least one UE.

[0180] Figure 12 A diagram of a system 1200 including a device 1205 supporting dynamic coding for a wireless system according to aspects of the present disclosure is shown. The device 1205 can be an example of, or include components of, the device 905, device 1005, or base station 105 as described herein. The device 1205 can include components for two-way voice and data communications, including components for sending and receiving communications, including a communications manager 1210, a network communications manager 1215, a transceiver 1220, an antenna 1225, a memory 1230, a processor 1240, and an inter-station communications manager 1245. These components can communicate electronically via one or more buses, such as a bus 1250.

[0181] The communication manager 1210 can perform the following operations: identify a set of coded packets associated with a multicast service channel, the coded packet set corresponding to a set of source packets encoded based on a set of network coding parameters; map a first subset of the coded packet set to a first set of resources based on a first resource set of the multicast service channel being associated with a first coding rate greater than a threshold coding rate; map a second subset of the coded packet set to a second set of resources based on a second resource set of the multicast service channel being associated with a second coding rate less than the threshold coding rate; and use the first set of resources to send the first subset of the coded packet set, and use the second set of resources to send the second subset of the coded packet set.

[0182] The network communications manager 1215 may manage communications with the core network (eg, via one or more wired backhaul links). For example, the network communications manager 1215 may manage the transmission of data communications for client devices (eg, one or more UEs 115).

[0183] The transceiver 1220 can communicate bidirectionally via one or more antennas, wired or wireless links as described above. For example, the transceiver 1220 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The transceiver 1220 can also include a modem for modulating packets and providing the modulated packets to the antenna for transmission, and demodulating packets received from the antenna.

[0184] In some cases, a wireless device may include a single antenna 1225. However, in some cases, a wireless device may have more than one antenna 1225 that are capable of sending or receiving multiple wireless transmissions simultaneously.

[0185] Memory 1230 may include random access memory (RAM), read-only memory (ROM), or a combination thereof. Memory 1230 may store computer-readable code 1235 including instructions that, when executed by a processor (e.g., processor 1240), cause the device to perform the various functions described herein. In some cases, memory 1230 may also contain, among other things, a basic I / O system (BIOS), which may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0186] Processor 1240 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a central processing unit (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, processor 1240 may be configured to operate a memory array using a memory controller. In some cases, the memory controller may be integrated into processor 1240. Processor 1240 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1230) to cause device 1205 to perform various functions (e.g., functions or tasks that support dynamic encoding for a wireless system).

[0187] The inter-site communication manager 1245 can manage communications with other base stations 105 and can include a controller or scheduler for controlling communications with the UE 115 in cooperation with the other base stations 105. For example, the inter-site communication manager 1245 can coordinate the scheduling of transmissions to the UE 115 to implement various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-site communication manager 1245 can provide an X2 interface within the LTE / LTE-A wireless communication network technology to provide communications between the base stations 105.

[0188] The code 1235 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 1235 may be stored in a non-transitory computer-readable medium (e.g., system memory or other types of memory). In some cases, the code 1235 may not be directly executable by the processor 1240, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0189] Figure 13 A flow chart illustrating a method 1300 for supporting dynamic coding for a wireless system according to aspects of the present disclosure is shown. The operations of the method 1300 may be implemented by the base station 105 or components thereof as described herein. For example, the operations of the method 1300 may be implemented by the base station 105 or components thereof as described herein. Figures 9 to 12 In some examples, the base station may execute an instruction set to control functional elements of the base station to perform the functions described below. Additionally or alternatively, the base station may use dedicated hardware to perform various aspects of the functions described below.

[0190] At 1305, the base station may identify a set of coded packets associated with a multicast service channel, the set of coded packets corresponding to a set of source packets encoded based on a set of network coding parameters. The operations of 1305 may be performed according to methods described herein. In some examples, aspects of the operations of 1305 may be performed as described with reference to Figures 9 to 12 The described coded packet identifier is performed.

[0191] At 1310, the base station may map a first subset of the coded set of packets onto a first set of resources based on the first set of resources of the multicast service channel being associated with a first coding rate greater than a threshold coding rate. The operations of 1310 may be performed according to the methods described herein. In some examples, aspects of the operations of 1310 may be performed as described with reference to Figures 9 to 12 The first packet mapping component described is performed.

[0192] At 1315, the base station may map a second subset of the set of coded packets onto a second set of resources based on the second set of resources of the multicast service channel being associated with a second coding rate that is less than the threshold coding rate. 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 9 to 12 The second packet mapping component described is performed.

[0193] At 1320, the base station may transmit a first subset of the set of coded packets using a first set of resources and a second subset of the set of coded packets using a second set of resources. The operations of 1320 may be performed according to the methods described herein. In some examples, aspects of the operations of 1320 may be performed as described with reference to Figures 9 to 12 The packet transmitter described is performed.

[0194] Figure 14 A flow chart illustrating a method 1400 for supporting dynamic coding for a wireless system according to aspects of the present disclosure is shown. The operations of the method 1400 may be implemented by the base station 105 or components thereof as described herein. For example, the operations of the method 1400 may be implemented by the base station 105 or components thereof as described herein. Figures 9 to 12 In some examples, the base station may execute an instruction set to control functional elements of the base station to perform the functions described below. Additionally or alternatively, the base station may use dedicated hardware to perform various aspects of the functions described below.

[0195] At 1405, the base station may identify a set of coded packets associated with a multicast service channel, the set of coded packets corresponding to a set of source packets encoded based on a set of network coding parameters. The operations of 1405 may be performed according to methods described herein. In some examples, aspects of the operations of 1405 may be performed as described with reference to Figures 9 to 12 The described coded packet identifier is performed.

[0196] At 1410, the base station may map a first subset of the coded packet set onto a first set of resources based on the first set of resources of the multicast service channel being associated with a first coding rate greater than a threshold coding rate. The operations of 1410 may be performed according to the methods described herein. In some examples, aspects of the operations of 1410 may be performed as described with reference to Figures 9 to 12 The first packet mapping component described is performed.

[0197] At 1415, the base station may map the first subset of the set of coded packets to the first set of symbols for the first time slot period. The operations of 1415 may be performed according to the methods described herein. In some examples, aspects of the operations of 1415 may be performed as described with reference to Figures 9 to 12 The first packet mapping component described is performed.

[0198] At 1420, the base station may map a second subset of the set of coded packets onto a second set of resources based on the second set of resources of the multicast service channel being associated with a second coding rate that is less than the threshold coding rate. The operations of 1420 may be performed according to the methods described herein. In some examples, aspects of the operations of 1420 may be as described with reference to Figures 9 to 12 The second packet mapping component described is performed.

[0199] At 1425, the base station may map a second subset of the set of coded packets to a second set of symbols in a second time slot period that is temporally subsequent to the first time slot period. The operations of 1425 may be performed according to the methods described herein. In some examples, aspects of the operations of 1425 may be performed as described with reference to Figures 9 to 12 The second packet mapping component described is performed.

[0200] At 1430, the base station may transmit a first subset of the set of coded packets using a first set of resources and a second subset of the set of coded packets using a second set of resources. The operations of 1430 may be performed according to the methods described herein. In some examples, aspects of the operations of 1430 may be performed as described with reference to Figures 9 to 12 The packet transmitter described is performed.

[0201] Figure 15 A flow chart illustrating a method 1500 for supporting dynamic coding for a wireless system according to aspects of the present disclosure is shown. The operations of the method 1500 may be implemented by the base station 105 or components thereof as described herein. For example, the operations of the method 1500 may be implemented by the base station 105 or components thereof as described herein. Figures 9 to 12In some examples, the base station may execute an instruction set to control functional elements of the base station to perform the functions described below. Additionally or alternatively, the base station may use dedicated hardware to perform various aspects of the functions described below.

[0202] At 1505, the base station may identify a set of coded packets associated with a multicast service channel, the set of coded packets corresponding to a set of source packets encoded based on a set of network coding parameters. The operations of 1505 may be performed according to methods described herein. In some examples, aspects of the operations of 1505 may be performed as described with reference to Figures 9 to 12 The described coded packet identifier is performed.

[0203] At 1510, the base station may map a first subset of the coded set of packets onto a first set of resources based on the first set of resources of the multicast service channel being associated with a first coding rate greater than a threshold coding rate. The operations of 1510 may be performed according to the methods described herein. In some examples, aspects of the operations of 1510 may be performed as described with reference to Figures 9 to 12 The first packet mapping component described is performed.

[0204] At 1515, the base station may map a second subset of the set of coded packets onto a second set of resources based on the second set of resources of the multicast service channel being associated with a second coding rate that is less than the threshold coding rate. The operations of 1515 may be performed according to the methods described herein. In some examples, aspects of the operations of 1515 may be as described with reference to Figures 9 to 12 The second packet mapping component described is performed.

[0205] At 1520, the base station may transmit a first subset of the set of coded packets using a first set of resources and a second subset of the set of coded packets using a second set of resources. The operations of 1520 may be performed according to the methods described herein. In some examples, aspects of the operations of 1520 may be as described with reference to Figures 9 to 12 The packet transmitter described is performed.

[0206] At 1525, the base station may schedule at least one feedback channel for a set of user equipment (UE) associated with the multicast service channel in one or more resources of the second set of resources. The operations of 1525 may be performed according to the methods described herein. In some examples, aspects of the operations of 1525 may be performed as described with reference to Figures 9 to 12 The feedback scheduler described is executed.

[0207] At 1530, the base station may monitor feedback information from the set of UEs via one or more resources. The operations of 1530 may be performed according to the methods described herein. In some examples, aspects of the operations of 1530 may be as described with reference to Figures 9 to 12 The feedback monitor described is implemented.

[0208] Figure 16 A flow chart illustrating a method 1600 for supporting dynamic coding for a wireless system according to aspects of the present disclosure is shown. The operations of the method 1600 may be implemented by the base station 105 or components thereof as described herein. For example, the operations of the method 1600 may be implemented by the base station 105 or components thereof as described herein. Figures 9 to 12 In some examples, the base station may execute an instruction set to control functional elements of the base station to perform the functions described below. Additionally or alternatively, the base station may use dedicated hardware to perform various aspects of the functions described below.

[0209] At 1605, the base station may identify a set of coded packets associated with a multicast service channel, the set of coded packets corresponding to a set of source packets encoded based on a set of network coding parameters. The operations of 1605 may be performed according to methods described herein. In some examples, aspects of the operations of 1605 may be performed as described with reference to Figures 9 to 12 The described coded packet identifier is performed.

[0210] At 1610, the base station may map a first subset of the coded set of packets onto a first set of resources based on the first set of resources of the multicast service channel being associated with a first coding rate greater than a threshold coding rate. The operations of 1610 may be performed according to the methods described herein. In some examples, aspects of the operations of 1610 may be as described with reference to Figures 9 to 12 The first packet mapping component described is performed.

[0211] At 1615, the base station may map a second subset of the set of coded packets onto a second set of resources based on the second set of resources of the multicast service channel being associated with a second coding rate that is less than the threshold coding rate. The operations of 1615 may be performed according to the methods described herein. In some examples, aspects of the operations of 1615 may be as described with reference to Figures 9 to 12 The second packet mapping component described is performed.

[0212] At 1620, the base station may transmit a first subset of the set of coded packets using a first set of resources and a second subset of the set of coded packets using a second set of resources. The operations of 1620 may be performed according to the methods described herein. In some examples, aspects of the operations of 1620 may be as described with reference to Figures 9 to 12The packet transmitter described is performed.

[0213] At 1625, the base station may identify a second set of coded packets corresponding to a second set of source packets encoded based on a second set of network coding parameters. The operations of 1625 may be performed according to the methods described herein. In some examples, aspects of the operations of 1625 may be performed as described with reference to Figures 9 to 12 The described coded packet identifier is performed.

[0214] At 1630, the base station may map the first portion of the second set of coded packets onto one or more resources. The operations of 1630 may be performed according to the methods described herein. In some examples, aspects of the operations of 1630 may be as described with reference to Figures 9 to 12 The first packet mapping component described is performed.

[0215] At 1635, the base station may use one or more resources to send a first portion of a second set of coded packets. The operations of 1635 may be performed according to the methods described herein. In some examples, aspects of the operations of 1635 may be performed as described with reference to Figures 9 to 12 The packet transmitter described is performed.

[0216] It should be noted that the methods described herein describe possible implementations, and that the operations and steps may be rearranged or otherwise modified, and other implementations are possible. Furthermore, aspects from two or more methods may be combined.

[0217] Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system may be described for example purposes, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used throughout much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks. For example, the techniques described herein may 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.

[0218] The information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout the specification may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0219] The various illustrative blocks and components described in conjunction with the disclosure herein may be implemented or executed 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 combination of 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).

[0220] The functions described herein may be implemented using hardware, software executed by a processor, firmware, or any combination thereof. If implemented using software executed by a processor, the functions may be stored on or transmitted via a computer-readable medium as one or more instructions or codes. Other examples and implementations are within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or a combination of any of these. Features that implement the functions may also be physically located at various locations, including being distributed so that parts of the functions are implemented at different physical locations.

[0221] Computer readable medium includes non-transient computer storage medium and communication medium, and communication medium includes any medium that promotes the transmission of computer program from one place to another place.Non-transient storage medium can be any available medium that can be accessed by general-purpose computer or special-purpose computer.By way of example and not limitation, non-transient computer readable medium can 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 device or can be used for carrying or storing desired program code unit and any other non-transient medium that can be accessed by general-purpose or special-purpose computer or general or special-purpose processor in the form of instruction or data structure.In addition, any connection is suitably referred to as computer readable medium.For example, if software is to be sent from website, server or other remote source using coaxial cable, optical fiber cable, twisted pair, digital subscriber line (DSL) or wireless technology such as infrared, radio and microwave, then coaxial cable, optical fiber cable, twisted pair, DSL or wireless technology such as infrared, radio and microwave are included in the definition of computer readable medium. As used herein, disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, wherein disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

[0222] 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."

[0223] In the accompanying drawings, similar components or features may have the same reference number. In addition, various components of the same type may be distinguished by following the reference number with a dash and a second reference number that distinguishes between the similar components. If only the first reference number is used in the specification, the description applies to any of the similar components having the same first reference number, regardless of the second reference number or other subsequent reference numbers.

[0224] The descriptions set forth herein in conjunction with the accompanying drawings describe example configurations and do 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 "having advantages over other examples." The detailed description includes specific details for the purpose of providing an understanding of the described techniques. However, these techniques may be implemented without these specific details. In some instances, known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0225] The description herein is provided to enable those skilled in the art to implement or use the present disclosure. Various modifications to the present disclosure will be apparent to those skilled in the art, and the overall 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 is to be given the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a base station, comprising: identifying a set of coded packets associated with a multicast service channel, the set of coded packets corresponding to a set of source packets encoded based at least in part on a set of network coding parameters; mapping a first subset of the set of coded packets onto a first set of resources of the multicast service channel based at least in part on the first set of resources being associated with a first coding rate greater than a threshold coding rate; mapping a second subset of the set of coded packets onto the second set of resources of the multicast service channel based at least in part on being associated with a second coding rate that is less than the threshold coding rate, wherein the second subset of the set of coded packets includes all packets in the set of coded packets that are not included in the first subset of the set of coded packets; as well as Multicasting the coded set of packets includes sending the first subset of the coded set of packets using the first set of resources and sending the second subset of the coded set of packets using the second set of resources.

2. The method according to claim 1, further comprising: mapping the first subset of the set of coded packets to a first set of symbols for a first time slot period; as well as The second subset of the set of coded packets is mapped to a second set of symbols in a second time slot period that is subsequent in time to the first time slot period.

3. The method according to claim 1, further comprising: Determining a threshold number of coded packets, wherein the first subset of the set of coded packets corresponds to a first number of coded packets that is below the threshold number of coded packets, and the second subset of the set of coded packets corresponds to a second number of coded packets that is above the threshold number of coded packets.

4. The method according to claim 3, further comprising: determining a channel quality of the multicast service channel, the channel quality corresponding to at least one user equipment (UE) supported by the base station; as well as The threshold number of coded packets is determined based at least in part on the channel quality.

5. The method according to claim 4, further comprising: A number of UEs capable of decoding the set of coded packets is determined based at least in part on the channel quality, wherein the threshold number of coded packets is determined based at least in part on the number of UEs capable of decoding the set of coded packets.

6. The method according to claim 3, wherein: The threshold number of encoded packets is determined based at least in part on an ability of a threshold percentage of a set of user equipment (UEs) associated with the multicast service channel to recover the set of source packets based on the transmitted first and second subsets.

7. The method according to claim 1, further comprising: scheduling at least one feedback channel for a set of user equipments UE associated with the multicast service channel in one or more resources of the second set of resources; as well as Feedback information from the set of UEs is monitored via the one or more resources.

8. The method according to claim 7, wherein: Monitoring the feedback information includes: A negative acknowledgement message associated with the first subset of the encoded set of packets is received from at least one UE in the set of UEs.

9. The method according to claim 8, further comprising: The second subset of the coded set of packets is sent to the at least one UE in the set of UEs based at least in part on the negative acknowledgement message.

10. The method according to claim 7, further comprising: determining, based at least in part on the monitoring, that there is no feedback information from any UE in the set of UEs; as well as A second set of coded packets corresponding to a second set of source packets is sent to the set of UEs based at least in part on determining that the feedback information is absent.

11. The method according to claim 7, wherein: Monitoring the feedback information includes: An indication of a difference between a number of coded packets used to decode the set of source packets and a number of the first subset of the set of coded packets received by the at least one UE is received from the at least one UE.

12. The method according to claim 11, further comprising: determining to cease transmission of coded packets corresponding to the set of coded packets based at least in part on the difference and a number of negative acknowledgement messages received from the set of UEs; as well as A second set of coded packets corresponding to a second set of source packets is sent to the set of UEs based at least in part on determining to cease transmission.

13. The method according to claim 1, further comprising: identifying a second set of coded packets corresponding to a second set of source packets encoded based at least in part on a second set of network coding parameters; mapping a first portion of the second set of coded packets onto one or more resources; as well as The first portion of the second set of coded packets is sent using the one or more resources.

14. The method according to claim 13, wherein: The first subset and the second subset of the set of encoded packets are sent to a first group of user equipments (UEs); and The first portion of the second set of coded packets is sent to a second group of UEs different from the first group of UEs, the second group of UEs being associated with a higher channel quality than the first group of UEs.

15. The method according to claim 14, wherein: The first portion of the second set of coded packets is sent on a different frequency band than the first subset and the second subset; and The one or more resources at least partially overlap in time with the second set of resources.

16. The method according to claim 14, wherein The first portion of the second set of encoded packets is associated with a service other than the multicast service channel.

17. The method according to claim 13, further comprising: mapping a second portion of the second set of coded packets onto a third set of resources; as well as The second portion of the second set of coded packets is sent using the third set of resources.

18. The method according to claim 17, further comprising: determining a threshold number of groups associated with the first resource set and the second resource set; as well as The third set of resources is determined based at least in part on the threshold number of packets.

19. The method according to claim 1, wherein The network coding parameter set corresponds to a fountain code.

20. An apparatus for wireless communication at a base station, comprising: processor, a memory coupled to the processor; as well as Instructions, which are stored in the memory and executable by the processor, cause the device to perform the following operations: identifying a set of coded packets associated with a multicast service channel, the set of coded packets corresponding to a set of source packets encoded based at least in part on a set of network coding parameters; mapping a first subset of the set of coded packets onto a first set of resources of the multicast service channel based at least in part on the first set of resources being associated with a first coding rate greater than a threshold coding rate; mapping a second subset of the set of coded packets onto the second set of resources of the multicast service channel based at least in part on being associated with a second coding rate that is less than the threshold coding rate, wherein the second subset of the set of coded packets includes all packets in the set of coded packets that are not included in the first subset of the set of coded packets; as well as Multicasting the coded set of packets includes sending the first subset of the coded set of packets using the first set of resources and sending the second subset of the coded set of packets using the second set of resources.

21. The device according to claim 20, wherein The instructions may also be executed by the processor to cause the device to perform the following operations: mapping the first subset of the set of coded packets to a first set of symbols for a first time slot period; as well as The second subset of the set of coded packets is mapped to a second set of symbols in a second time slot period that is subsequent in time to the first time slot period.

22. The device according to claim 20, wherein The instructions may also be executed by the processor to cause the device to perform the following operations: Determining a threshold number of coded packets, wherein the first subset of the set of coded packets corresponds to a first number of coded packets that is below the threshold number of coded packets, and the second subset of the set of coded packets corresponds to a second number of coded packets that is above the threshold number of coded packets.

23. The device according to claim 22, wherein The instructions may also be executed by the processor to cause the device to perform the following operations: determining a channel quality of the multicast service channel, the channel quality corresponding to at least one user equipment (UE) supported by the base station; and The threshold number of coded packets is determined based at least in part on the channel quality.

24. The device according to claim 23, wherein The instructions may also be executed by the processor to cause the device to perform the following operations: A number of UEs capable of decoding the set of coded packets is determined based at least in part on the channel quality, wherein the threshold number of coded packets is determined based at least in part on the number of UEs capable of decoding the set of coded packets.

25. The apparatus according to claim 22, wherein The threshold number of encoded packets is determined based at least in part on an ability of a threshold percentage of a set of user equipment (UEs) associated with the multicast service channel to recover the set of source packets based on the transmitted first and second subsets.

26. The apparatus according to claim 20, wherein The instructions may also be executed by the processor to cause the device to perform the following operations: scheduling at least one feedback channel for a set of user equipments UE associated with the multicast service channel in one or more resources of the second set of resources; as well as Feedback information from the set of UEs is monitored via the one or more resources.

27. The device according to claim 26, wherein The instructions for monitoring the feedback information may be executed by the processor to cause the apparatus to perform the following operations: A negative acknowledgement message associated with the first subset of the encoded set of packets is received from at least one UE in the set of UEs.

28. The apparatus according to claim 27, wherein The instructions may also be executed by the processor to cause the device to perform the following operations: The second subset of the coded set of packets is sent to the at least one UE in the set of UEs based at least in part on the negative acknowledgement message.

29. The apparatus according to claim 26, wherein The instructions may also be executed by the processor to cause the device to perform the following operations: determining, based at least in part on the monitoring, that there is no feedback information from any UE in the set of UEs; as well as A second set of coded packets corresponding to a second set of source packets is sent to the set of UEs based at least in part on determining that the feedback information is absent.

30. The apparatus of claim 26, wherein: The instructions for monitoring the feedback information may be executed by the processor to cause the apparatus to perform the following operations: An indication of a difference between a number of coded packets used to decode the set of source packets and a number of the first subset of the set of coded packets received by the at least one UE is received from the at least one UE.

31. The apparatus according to claim 30, wherein The instructions may also be executed by the processor to cause the device to perform the following operations: determining to cease transmission of coded packets corresponding to the set of coded packets based at least in part on the difference and a number of negative acknowledgement messages received from the set of UEs; as well as A second set of coded packets corresponding to a second set of source packets is sent to the set of UEs based at least in part on determining to cease transmission.

32. The apparatus of claim 20, wherein: The instructions may also be executed by the processor to cause the device to perform the following operations: identifying a second set of coded packets corresponding to a second set of source packets encoded based at least in part on a second set of network coding parameters; mapping a first portion of the second set of coded packets onto one or more resources; as well as The first portion of the second set of coded packets is sent using the one or more resources.

33. The apparatus of claim 32, wherein: The first subset and the second subset of the set of encoded packets are sent to a first group of user equipments (UEs); and The first portion of the second set of coded packets is sent to a second group of UEs different from the first group of UEs, the second group of UEs being associated with a higher channel quality than the first group of UEs.

34. The apparatus of claim 33, wherein: The first portion of the second set of coded packets is sent on a different frequency band than the first subset and the second subset; and The one or more resources at least partially overlap in time with the second set of resources.

35. The apparatus of claim 33, wherein: The first portion of the second set of encoded packets is associated with a service other than the multicast service channel.

36. The apparatus of claim 32, wherein: The instructions may also be executed by the processor to cause the device to perform the following operations: mapping a second portion of the second set of coded packets onto a third set of resources; and The second portion of the second set of coded packets is sent using the third set of resources.

37. The apparatus according to claim 36, wherein The instructions may also be executed by the processor to cause the device to perform the following operations: determining a threshold number of packets associated with the first set of resources and the second set of resources; and The third set of resources is determined based at least in part on the threshold number of packets.

38. The apparatus of claim 20, wherein: The network coding parameter set corresponds to a fountain code.

39. An apparatus for wireless communication at a base station, comprising: means for identifying a set of coded packets associated with a multicast service channel, the set of coded packets corresponding to a set of source packets encoded based at least in part on a set of network coding parameters; means for mapping a first subset of the set of coded packets onto the first set of resources of the multicast service channel based at least in part on being associated with a first coding rate greater than a threshold coding rate; means for mapping a second subset of the set of coded packets onto a second set of resources of the multicast service channel based at least in part on being associated with a second coding rate that is less than the threshold coding rate, wherein the second subset of the set of coded packets includes all packets of the set of coded packets that are not included in the first subset of the set of coded packets; as well as Means for multicasting the coded set of packets include means for sending the first subset of the coded set of packets using the first set of resources and sending the second subset of the coded set of packets using the second set of resources.

40. A non-transitory computer-readable medium storing code for wireless communication at a base station, the code comprising instructions executable by a processor to: identifying a set of coded packets associated with a multicast service channel, the set of coded packets corresponding to a set of source packets encoded based at least in part on a set of network coding parameters; mapping a first subset of the set of coded packets onto a first set of resources of the multicast service channel based at least in part on the first set of resources being associated with a first coding rate greater than a threshold coding rate; mapping a second subset of the set of coded packets onto the second set of resources of the multicast service channel based at least in part on being associated with a second coding rate that is less than the threshold coding rate, wherein the second subset of the set of coded packets includes all packets in the set of coded packets that are not included in the first subset of the set of coded packets; as well as Multicasting the coded set of packets includes sending the first subset of the coded set of packets using the first set of resources and sending the second subset of the coded set of packets using the second set of resources.

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