Patent Description:
Examples of such multiple-access systems include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, and orthogonal frequency division multiple access (OFDMA) systems, (e.g., a Long Term Evolution (LTE) system). A wireless multiple-access communications system may include a number of base stations, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE).

As data rates increase, faster processing if transmitted signals is beneficial in order to maintain relatively high data rates and relatively low latency. Additionally, as wireless communications networks become more congested, operators are seeking ways to increase capacity, such as via using small cells, unlicensed spectrum, or wireless local area networks (WLANs) to offload some of the traffic and/or signaling. Many of the approaches for enhancing capacity may cause interference with concurrent communications in a cell, or in adjacent/neighboring cells. Such interference may be narrowband interference or "bursty" interference having a short time duration. In order to provide enhanced data rates through a wireless communications network, it may be beneficial to enable faster processing of transmissions and mitigate various types of interference at a UE or base station.

<CIT> provides a method for transmitting a broadcast signal. The method supports future broadcast services in an environment supporting future hybrid broadcasting using terrestrial broadcast networks and the Internet. Also, the invention provides efficient signaling methods capable of using both terrestrial broadcast networks and the Internet in the environment supporting future hybrid broadcasting.

Standards specification paper, <NPL>", put forth by DVB organization describes the RF/Transmission of a physical layer waveform, which enables flexible configurations of physical layer resources to target a variety of operating modes. The intent is to signal the applied technologies and allow for future technology adaptation.

The described techniques relate to improved methods, systems, and devices that support dual stage channel interleaving for data transmission. For example, the described techniques provide for dual stage channel interleaving, in which code blocks are interleaved at the code block level, concatenated with other interleaved code blocks, allocated into orthogonal frequency division multiplexing (OFDM) symbols, interleaved again at the coded bit level, the modulation symbol level, or resource element level within each OFDM symbol, and transmitted to a receiver. The interleaving within the code block and interleaving within the OFDM symbols, in some examples, allows pipelined implementation of decoding of the code blocks at the receiver, for faster processing. In some cases, systematic data and parity data may be interleaved within the code block data to provide a uniform distribution of the systematic data in time within the code block. The interleaved code block data may provide time diversity for the code block data and the interleaved OFDM symbol data may provide frequency diversity for the code block data, thus helping to mitigate narrowband and/or bursty interference.

A method of wireless communication is described, as provided in independent claim <NUM>.

An apparatus for wireless communication is described, as provided in independent claim <NUM>.

A non-transitory computer readable medium for wireless communication is described, as provided in independent claim <NUM>.

Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for interleaving systematic data and parity data within the code block data to provide a uniform distribution of the systematic data in time within the code block. In some examples of the method, apparatus, and non-transitory computer-readable medium described above, the interleaved code block data provides time diversity for the code block data and the interleaved OFDM symbol data provides frequency diversity for the code block data. In some examples of the method, apparatus, and non-transitory computer-readable medium described above, the code block data comprises turbo code encoded data, low density parity check (LDPC) encoded data, or tail-biting convolutional code (TBCC) encoded data.

Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for allocating interleaved code block data from multiple code blocks into a plurality of other OFDM symbols; interleaving, for the plurality of other OFDM symbols, the associated portion of the interleaved code block data to generate interleaved OFDM symbol data for the plurality of other OFDM symbols; and transmitting the plurality of other OFDM symbols of the code block to the receiver. In some examples of the method, apparatus, and non-transitory computer-readable medium described above, interleaving within the code block and interleaving within the OFDM symbols may allow pipelined implementation of decoding of the code blocks at the receiver.

In some examples of the method, apparatus, and non-transitory computer-readable medium described above, the allocating may include identifying a resource allocation of wireless resources for transmission of the code blocks, the resource allocation including an allocation of the plurality of OFDM symbols, a plurality of resource elements (REs) within each OFDM symbol, and a set of spatial layers within each RE; firstly mapping the interleaved code block data to one or more spatial layers within a same RE; secondly mapping the interleaved code block data to a plurality of REs within an OFDM symbol; and thirdly mapping the interleaved code blocks data to the plurality of OFDM symbols.

Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for receiving, from the receiver, an indication of whether the receiver may be capable of supporting two stage channel interleaving. Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for performing two stage interleaving to generate the interleaved code block data and the interleaved OFDM symbol data responsive to the receiver indicating that it may be capable of supporting two stage interleaving. Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for performing a legacy no channel interleaving or single stage channel interleaving in an absence of receiving an indication that the receiver may be capable of supporting two stage channel interleaving.

Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for determining whether the code block data includes broadcast data to be transmitted to a plurality of receivers or unicast data to be transmitted to a single receiver, performing two stage channel interleaving to generate the interleaved code block data and the interleaved OFDM symbol data when the code block data includes unicast data, and bypassing the interleaving to generate the interleaved code block data and the interleaved OFDM symbol data when the code block data includes broadcast data.

In some examples of the method, apparatus, and non-transitory computer-readable medium described above, the interleaved code block data comprises interleaved systematic data and parity data within the code block, and the systematic data may be uniformly distributed throughout the interleaved code block data. In some examples of the method, apparatus, and non-transitory computer-readable medium described above, the interleaved code block data provides time diversity for the deinterleaved code block data and the interleaved OFDM symbol data provides frequency diversity for the deinterleaved code block data. In some examples of the method, apparatus, and non-transitory computer-readable medium described above, the decoding the deinterleaved code block data comprises decoding of turbo code encoded data, LDPC encoded data, or TBCC encoded data. In some examples of the method, apparatus, and non-transitory computer-readable medium described above, the decoding the deinterleaved code block data comprises pipelined decoding of the code block.

The claimed embodiments of the method, apparatus, and non-transitory computer-readable medium described above further include processes, features, means, or instructions for transmitting an indication to a transmitter of the transmitted code block that indicates capability for supporting the two stage channel interleaving.

The claimed embodiments of the method, apparatus, and non-transitory computer-readable medium described above further include processes, features, means, or instructions for receiving signaling indicating whether the transmitted code block contains interleaved code block data and interleaved OFDM symbol data; performing a legacy single stage deinterleaving of parity data within the transmitted code block when the signaling does not indicate that the transmitted code block contains interleaved OFDM symbol data; and performing the deinterleaving the interleaved OFDM symbol data, concatenating, and deinterleaving the interleaved code block data when the signaling does indicate that the transmitted code block contains interleaved OFDM symbol data.

Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for interleaving systematic data and parity data within the code block data to provide a uniform distribution of the systematic data in time within the code block. In some examples of the method, apparatus, and non-transitory computer-readable medium described above, the interleaved OFDM symbol data provides frequency diversity for the code block data. In some examples of the method, apparatus, and non-transitory computer-readable medium described above, the interleaved OFDM symbol data allows for pipelined decoding of the code block at the receiver.

Further scope of the applicability of the described methods and apparatuses will become apparent from the following detailed description, claims, and drawings. The detailed description and specific examples are given by way of illustration, since various changes and modifications within the scope of the appended claims will become apparent to those skilled in the art.

Additionally or alternatively, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label.

A UE or a base station operating in a wireless communications system may perform dual stage channel interleaving in which coded bits are interleaved at the code block level and at an OFDM symbol level. The code block level interleaving may provide time diversity for the code block data and the OFDM symbol level interleaving may provide frequency diversity for the code block data, thus helping to mitigate narrowband and/or bursty interference. The interleaving within the code block and interleaving within the OFDM symbols, in some examples, may allow pipelined implementation of decoding of the code blocks at the receiver, for faster processing. In some cases, systematic data and parity data may be interleaved within the code block data to provide a uniform distribution of the systematic data in time within the code block, further enhancing interference mitigation relative to systematic bits that are not interleaved within a code block.

By way of example, in many traditional or legacy LTE systems, transmissions are made within transmission tine intervals (TTIs). Within each TTI, a data stream may be transmitted between a base station and a UE in a physical downlink shared channel (PDSCH) for downlink communications or a physical uplink shared channel (PUSCH) for uplink communications. The data stream transmitted in the PDSCH or PUSCH may be segmented in units of code blocks. Each code block, in some deployments, is turbo code or LDPC code encoded, to generate systematic bits and parity bits for the code block. In many legacy systems, the parity bits may be interleaved within the code block, the systematic bits and interleaved parity bits may be put in a circular buffer, and a rate matching function will pick certain number of bits from circular buffer of each code block for one transmission. For a particular redundancy version identification (RVID), the starting point within the circular buffer is identified and a certain number of bits are retrieved from the circular buffer. The output from each circular buffer is sequentially concatenated and sent to a modulator. The modulated symbol is either filled frequency first, for PDSCH transmission, or time first, for PUSCH transmissions.

As indicated above, as data rates increase and operators employ various techniques to increase system capacity, additional techniques for enhancing decoding of transmissions and for mitigating some types of interference may be desirable. For example, various timing parameters for providing feedback of successful reception of a code block may require relatively fast processing of a received code block, and pipelined decoding of code blocks may be desirable. In some legacy systems, PUSCH transmissions may be configured such that wireless resources of a tone are filled for multiple OFDM symbols, and then the next tone is filled for the multiple OFDM symbols. Such techniques may not allow for pipelined decoding of OFDM symbols, as the multiple OFDM symbols are needed in order to process a code block.

Additionally, some types of transmissions used for increasing system capacity may have a higher likelihood of narrowband or bursty interference. For example, if a carrier uses a shared radio frequency spectrum band, other transmitters using the shared radio frequency spectrum band may transmit narrowband or short duration transmissions that may interfere with a transmission between a UE and a base station. Additionally, in some cases systems may use shorter TTIs for some transmissions, which may be more susceptible to bursty interference relative to systems that may use longer TTIs. For example, if an operator wants to employ wideband communications, such as through using a channel having an <NUM> bandwidth rather than four <NUM> channels, using 8x8 multiple-input-multiple-output (MIMO) on eight receive antennas and eight transmit antennas, and employing <NUM> quadrature amplitude modulation (<NUM> QAM), each OFDM symbol may be capable of transmitting multiple code blocks (e.g., up to <NUM> code blocks per OFDM symbol). Thus, within an OFDM symbol without interleaving, a code block may be contained within a fraction of the <NUM> channel (e.g., within the first <NUM>/20th of the bandwidth if there are <NUM> code blocks per OFDM symbol). Narrowband interference occupying all of a portion of the fraction of the bandwidth containing the code block may thus cause a failure to receive the entire code block.

Various of the techniques described herein, as indicated above, provide for dual stage channel interleaving in which code blocks are interleaved at the code block level, concatenated with other interleaved code blocks, allocated into OFDM symbols, interleaved again at the modulation symbol level within each OFDM symbol, and transmitted to a receiver. The interleaving within the code block and interleaving within the OFDM symbols may allow pipelined implementation of decoding of the code blocks at the receiver. Additionally, systematic data and parity data may be interleaved within the code block data to provide a uniform distribution of the systematic data in time within the code block. The interleaved code block data may provide time diversity for the code block data and the interleaved OFDM symbol data may provide frequency diversity for the code block data, thus helping to mitigate narrowband interference, bursty interference, or combinations thereof. In cases where modulation symbols from a code block naturally occupy multiple OFDM symbols (e.g., when the code block size is relatively long, the number of resource blocks (RBs) assigned is small, and the coding rate is relatively low), the systematic bits of the code block may be distributed uniformly across all OFDM symbols, thus providing additional time diversity.

Such dual stage interleaving techniques may thus achieve higher diversity in multiple cases. For example, in the case of a wideband assignment with narrowband interference, as a code block is distributed in the whole wideband assignment using the second stage interleaving (e.g., per OFDM symbol interleaving), the additional frequency diversity may mitigate the narrowband interference. Additionally or alternatively, in the case of a narrowband assignment with short time domain interference, as the systematic bits in a code block may be distributed in all OFDM symbols occupied by the code block through the first stage interleaving (e.g., code block-level interleaving), the additional time diversity may mitigate the short time domain interference.

In some examples, one or more UEs or base stations may use either dual stage channel interleaving or legacy channel interleaving for some transmissions. In such cases, a UE may indicate the capability for the dual stage channel interleaving support. When such a capability is indicated by the UE, the base station may determine whether to enable dual stage interleaving for unicast traffic, and may indicate the interleaving to use via dynamic or semi-static signaling. In some examples, broadcast traffic may follow legacy channel interleaving and mapping for backward compatibility. Such dual stage channel interleaving capability indications and scheduling may allow for an operator to configure certain traffic and certain UEs based on the capability of one or more UEs being served.

Aspects of the disclosure are initially described in the context of a wireless communications system. Subsequent figures depict examples of interleaving techniques that support dual stage channel interleaving. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to dual stage channel interleaving for data transmission.

<FIG> illustrates an example of a wireless communications system <NUM> in accordance with various aspects of the present disclosure. The wireless communications system <NUM> includes base stations <NUM>, UEs <NUM>, and a core network <NUM>. In some examples, the wireless communications system <NUM> may be a LTE (or LTE-Advanced) network. One or more of the UEs <NUM> may have a capability for dual stage channel interleaving, and one or more of the base stations <NUM> may account for such capabilities when scheduling communications and transmitting to provide for pipelined deciding and interference mitigation.

Each base station <NUM> may provide communication coverage for a respective geographic coverage area <NUM>. A UE <NUM> may additionally or alternatively be referred to as a mobile station, a subscriber station, a remote unit, a wireless device, an access terminal (AT), a handset, a user agent, a client, or like terminology. A UE <NUM> may additionally or alternatively be a cellular phone, a wireless modem, a handheld device, a personal computer, a tablet, a personal electronic device, a machine type communication (MTC) device, etc..

Base stations <NUM> may additionally or alternatively be referred to as eNodeBs (eNBs) <NUM>.

Examples of such multiple-access systems include CDMA systems, TDMA systems, FDMA systems, and OFDMA systems. A wireless multiple-access communications system may include a number of base stations, each simultaneously supporting communication for one or more multiple communication devices, which may be otherwise known as a UE.

In some cases, wireless system <NUM> may utilize both licensed and unlicensed radio frequency spectrum bands. For example, wireless system <NUM> may employ LTE License Assisted Access (LTE-LAA) or LTE Unlicensed (LTE U) radio access technology in an unlicensed band such as the <NUM> Industrial, Scientific, and Medical (ISM) band. When operating in unlicensed radio frequency spectrum bands, wireless devices such as base stations <NUM> and UEs <NUM> may employ listen before talk (LBT) procedures to ensure the channel is clear before transmitting data. In some cases, operations in unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers (CCs) operating in a licensed band. Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, or both. Duplexing in unlicensed spectrum may be based on frequency division duplex (FDD), time division duplex (TDD), or a combination of both.

An eCC may be characterized by one or more features including: wider bandwidth, shorter symbol duration, shorter TTIs, and modified control channel configuration. An eCC may additionally or alternatively be configured for use in unlicensed spectrum or shared spectrum (where more than one operator is allowed to use the spectrum). An eCC characterized by wide bandwidth may include one or more segments that may be utilized by UEs <NUM> that are not capable of monitoring the whole bandwidth or prefer to use a limited bandwidth (e.g., to conserve power). A shorter symbol duration is associated with increased subcarrier spacing. A device, such as a UE <NUM> or base station <NUM>, utilizing eCCs may transmit wideband signals (e.g., <NUM>, <NUM>, <NUM>, <NUM>, etc.) at reduced symbol durations (e.g., <NUM> microseconds). A TTI in eCC may comprise of one or multiple symbols. In some cases, the TTI duration (that is, the number of symbols in a TTI) may be variable. A shorter symbol duration is associated with increased subcarrier spacing. A device, such as a UE <NUM> or base station <NUM>, utilizing eCCs may transmit wideband signals (e.g., <NUM>, <NUM>, <NUM>, <NUM>, etc.) at reduced symbol durations (e.g., <NUM> microseconds). A TTI in eCC may comprise of one or multiple symbols. In some cases, the TTI duration (that is, the number of symbols in a TTI) may be variable.

As indicated above, in examples where shared radio frequency spectrum may be used for all or a portion of communications, when eCC is utilized, or combinations thereof, interference may occur that is narrowband interference, or short time duration or bursty interference may occur. In the example of <FIG>, a Wi-Fi AP <NUM> may communicate with a Wi-Fi receiver (not shown), and may generate an interfering signal <NUM> (e.g., narrowband and/or bursty interference) with one or more UEs <NUM> or base stations <NUM>. Various aspects of the present disclosure provide techniques for enhanced mitigation of such interference, while also providing enhanced capability for pipelined decoding operations for some transmissions.

<FIG> illustrates an example of a wireless communications system <NUM> for dual stage channel interleaving in wireless communications in accordance with various aspects of the present disclosure. UE <NUM>-a may be an example of a UE <NUM> as described herein with reference to <FIG>. UE <NUM>-a may be configured for dual stage channel interleaving. Base station <NUM>-a may be an example of base stations <NUM> as described herein with reference to <FIG>. The base station <NUM>-a may have an associated coverage area <NUM>-a, and may communicate with UE <NUM>-a via communications link <NUM>, which may be an example of communications link <NUM> of <FIG>.

In the example, of <FIG>, a Wi-Fi AP <NUM>-a may be located outside of the coverage area <NUM>-a, but may be capable of generating an interfering signal <NUM> that may cause interference at UE <NUM>-a. For example, the base station <NUM>-a may initiate a transmission using communications link <NUM>, and Wi-Fi AP <NUM>-a may transmit a relatively short and/or narrowband transmission (e.g., a ready to send (RTS) transmission). The Wi-Fi AP <NUM>-a may be outside of an energy detection range of base station <NUM>-a, and may not detect the transmission via communications link <NUM>, for example, and thus transmit interfering signal <NUM>. In various examples of the present disclosure, the communications link <NUM> may employ dual stage channel interleaving, in which coded bits are interleaved at a code block level and at an OFDM symbol level, thus providing frequency diversity for a code block transmitted using communications link <NUM> and potentially time diversity if the code block spans multiple OFDM symbols. Thus, such a transmission may have a higher likelihood of successful reception as the interfering signal <NUM> may cause interference with a portion of the transmission of communications link <NUM>, and the deinterleaving combined with decoding according to the coding scheme used (e.g., turbo coding or LDPC coding) may allow for successful decoding of the transmission.

Furthermore, as indicated above, some examples may configure transmissions to provide for pipelined decoding of a transmission. In such examples, pipelined decoding may be enabled through mapping of data within the wireless resources of communications link. For example, a resource allocation may include an allocation of the plurality of OFDM symbols, a plurality of REs within each OFDM symbol, and a set of spatial layers within each RE. In some examples, transmitting device (e.g., base station <NUM>-a or UE <NUM>-a) may first map interleaved code block data to one or more spatial layers within a same RE. The transmitting device may then map the interleaved code block data to a plurality of REs within an OFDM symbol, and finally map the interleaved code blocks data to the plurality of OFDM symbols. The receiving device (e.g., base station <NUM>-a or UE <NUM>-a that is receiving the transmission) may decode received transmissions on an OFDM symbol basis and perform processing as consecutive symbols are received.

The UE <NUM>-a, in claimed embodiments, may provide an indication to the base station <NUM>-a of a capability for the UE <NUM>-a to perform dual stage channel interleaving. Such signaling of an indication of the UE <NUM>-a capability may allow the base station <NUM>-a to configure either dual stage channel interleaving or legacy channel interleaving for some transmissions. When UE <NUM>-a indicated capability for dual stage channel interleaving, the base station <NUM>-a may determine whether to enable dual stage interleaving for unicast traffic, and may indicate the configured interleaving via dynamic or semi-static signaling. In some examples, broadcast traffic may follow legacy channel interleaving (or no interleaving) and mapping for backward compatibility.

<FIG> illustrates an example <NUM> of dual stage channel interleaving for data transmission in accordance with the claimed invention. The dual stage interleaving of example <NUM> may be performed by a UE <NUM> or base station <NUM> and be used for communications between UEs <NUM> and base stations <NUM> as discussed in <FIG>.

A code block may be input into an encoding block <NUM>. The code block may be provided according to established techniques, and may include uplink or downlink shared data to be transmitted using a PUSCH or PDSCH, for example. The encoding block <NUM>, in this example, may output systematic bits <NUM>, and a first set of parity bits <NUM> and a second set of parity bits <NUM>. Code block level interleaver <NUM> may then perform code block level interleaving on the encoded code block bits. In some examples, systematic bits <NUM> from the encoding block may be interleaved with parity bits <NUM>-<NUM> to provide that the systematic bits <NUM> and parity bits <NUM>-<NUM> are distributed throughout interleaved code block to provide interleaved systematic and parity bits <NUM>.

A concatenation and modulation block <NUM> may concatenate the interleaved systematic and parity bits <NUM> sequentially with consecutive code block level interleaved bits, and modulate the concatenated output into modulation symbols. Allocation of the modulation symbols to OFDM symbols may be performed at block <NUM>, to generate first OFDM symbol <NUM>, second OFDM symbol <NUM>, and third OFDM symbol <NUM>. The number of OFDM symbols is illustrated in <FIG> for the purposes of illustration and discussion, and the modulation symbols may be allocated to any number of OFDM symbols. The OFDM symbols <NUM>-<NUM> may then be provided to symbol interleaver <NUM>, which may perform a second interleaving step at OFDM symbol level within each OFDM symbol, which may provide frequency diversity for data within each OFDM symbol to provide interleaved first OFDM symbol <NUM>, interleaved second OFDM symbol <NUM>, and interleaved third OFDM symbol <NUM>. The interleaved OFDM symbols <NUM>-<NUM> may then be transmitted to a receiver.

Such dual stage channel interleaving may provide a unified design that achieves higher diversity in multiple cases. For example, in the case of a wideband channel transmission that experiences narrowband interference, the code block is distributed across the entire bandwidth of the wideband channel by the symbol interleaver <NUM>, thus enhancing the likelihood that a sufficient portion of the code block is received for successful decoding of the code block. In the case of a narrowband transmission that experiences bursty or short time domain interference, the distribution of the systematic bits across the code block as provided by code block level interleaver <NUM> may enhance the likelihood that a sufficient portion of the code block is received for successful decoding of the code block.

<FIG> illustrates an example of transmission processing components <NUM> that support dual stage channel interleaving for data transmission in accordance with various aspects of the present disclosure. Processing components <NUM> may be included in a UE <NUM> or base station <NUM> and be used for communications between UEs <NUM> and base stations <NUM> as discussed in <FIG>.

In some examples, dual stage interleaving may be provided through processing components used for coding, modulating, and transmitting. For example, within the base station <NUM> or UE <NUM> that is transmitting a signal, a rate matching component <NUM> may identify which set of coded bits are to be transmitted for each code block, according to legacy rate matching techniques. Transmission processing components <NUM> may then perform a code block level interleaving at block-level interleaver <NUM>. In some examples, a linear interleaver may be used to provide block-level interleaver <NUM>, and may provide a uniform distribution of systematic bits throughout the interleaved code block, although other interleaving techniques may be used in some cases. In some examples, block-level interleaver <NUM> may perform block level interleaving on control channel transmissions and shared channel transmissions. In cases where block-level interleaving is performed on control channel transmissions, the control channel may use TBCC rather than turbo coding or LDPC coding. In the TBCC case, the code is not systematic, and the block-level interleaver <NUM> may provide interleaving that may break bursty errors (in either time domain or frequency domain) into random errors, which better fits the TBCC.

A concatenation and modulation component may concatenate the output of the block-level interleaver <NUM> sequentially and modulate the concatenated output into modulation symbols. Symbol allocation component <NUM> may allocate the modulation symbols into OFDM symbols. Then, symbol-level interleaver <NUM> may perform a second interleaving step at OFDM symbol level within each OFDM symbol, which may provide frequency diversity for data within each OFDM symbol. The interleaved OFDM symbols may be provided to transmit components <NUM> (e.g., inverse fast fourier transform (IFFT) components, analog to digital converter (ADC) components, radio frequency (RF) components) for transmission via one or more antennas <NUM>. In some examples, a linear interleaver may be used to provide symbol-level interleaver <NUM>, although other interleaving techniques may be used in some cases, and may provide enhanced frequency diversity for bits of a code block transmitted within an OFDM symbol.

<FIG> illustrates an example of example of receive processing components <NUM> that support dual stage channel interleaving for data transmission in accordance with various aspects of the present disclosure. Processing components <NUM> may be included in a UE <NUM> or base station <NUM> and be used for communications between UEs <NUM> and base stations <NUM> as discussed in <FIG>.

In some examples, dual stage interleaving may be provided through processing components used for receiving, decoding, and demodulating transmissions. For example, within the base station <NUM> or UE <NUM> that is receiving a signal, a transmission may be received at one or more antennas <NUM>. The transmission may include interleaved OFDM symbols, as discussed above, which may be processed using receive components <NUM> (e.g., fast fourier transform (FFT) components, ADC components, RF components).

The received signal may be provided to symbol-level deinterleaver <NUM>, which may perform a symbol-level deinterleaving at a modulation symbol level within each OFDM symbol. In some examples, a linear deinterleaver may be used to provide symbol-level deinterleaver <NUM>, although other deinterleaving techniques may be used based on the interleaving technique used at the transmitter.

The deinterleaved modulation symbols may be provided to symbol allocation component <NUM>, which may determine the allocation of modulation symbols in the received OFDM symbols, and provide modulation symbols to symbol demodulation component <NUM>. The symbol demodulation component <NUM> may demodulate the modulation symbols and concatenate the demodulated symbols to provide an interleaved code block to a block-level deinterleaver <NUM>. The block-level deinterleaver <NUM> perform a code block level deinterleaving, which may deinterleave systematic bits and parity bits of the code block. In some examples, a linear deinterleaver may be used to provide block-level deinterleaver <NUM>, although other deinterleaving techniques may be used in some cases. In some examples, received transmissions may include control channel transmissions, and block-level deinterleaver <NUM> may perform block level deinterleaving on control channel transmissions and shared channel transmissions.

The deinterleaved code block may be provided to rate dematching component <NUM>, which may identify which set of coded bits were transmitted for each code block, according to legacy rate matching techniques. Such dual stage channel deinterleaving may provide a unified design that achieves higher diversity in multiple cases, as discussed above.

<FIG> illustrates an example of a process flow <NUM> for dual stage channel interleaving for data transmission in accordance with various aspects of the present disclosure. The steps of process flow <NUM> may be performed by UE <NUM>-b and base station <NUM>-b, which may be examples of a UE <NUM> and a base station <NUM> as described above.

The base station <NUM>-b and UE <NUM>-b may perform a connection establishment <NUM> to establish a radio resource control (RRC) connection. In some examples, various configurations of parameters may be performed as part of the connection establishment <NUM>, such as enabling dual stage channel interleaving via dynamic or semi-static configuration changes, configuring various communications parameters (e.g., Hybrid Automatic Repeat Request (HARQ) parameters and HARQ timing), configuring physical uplink control channel (PUCCH) resource offsets, or configuring interleaving for unicast versus broadcast transmissions, for example. In some cases, the UE <NUM>-b may signal UE capability <NUM> to base station <NUM>-b, which may include an indication that the UE <NUM>-b is capable of dual stage channel interleaving.

The base station <NUM>-b may, at optional block <NUM>, identify the dual stage interleaving capability for UE <NUM>-b, such as according to the signaled UE capability <NUM>, for example. In other examples, the base station <NUM>-b may identify the capability of the UE <NUM>-b through other techniques, such as by an indication of a UE-type of UE <NUM>-b, an indication of one or more other capabilities that may additionally or alternatively indicate capability for dual stage channel interleaving, or an indication in an access request, to name but a few examples. In some examples, the base station <NUM>-b may determine whether to use dual stage interleaving for a transmission by determining whether code block data to be transmitted includes broadcast data to be transmitted to a plurality of receivers or unicast data to be transmitted to a single receiver. Two stage channel interleaving may be performed to generate interleaved code block data and the interleaved OFDM symbol data when the code block data includes unicast data, and dual stage interleaving may be bypassed when the code block data includes broadcast data, in some examples.

At block <NUM>, the base station may perform coding and rate matching for downlink data to be transmitted to UE <NUM>-b. While the example of <FIG> illustrates a downlink transmission that uses dual stage channel interleaving, such techniques are additionally or alternatively applicable to uplink transmissions. The coding and rate matching for the downlink data to be transmitted to UE <NUM>-b may be performed according to established legacy coding and rate matching (e.g., as described in 3GPP technical specification <NUM>).

At block <NUM>, the base station <NUM>-b may perform code block level interleaving on the coded and rate matched code block data. The code block level interleaving may include interleaving systematic data and parity data within the code block data to provide a uniform distribution of the systematic data in time within the code block, for example. In some examples, a linear interleaver is used for code block level interleaving, to provide the uniform distribution of the systematic data in time within the code block. In other examples other types of interleaving may be used, such as convolutional interleaving, random interleaving, S-random interleaving (e.g., where the interleaver is a known random permutation with the constraint that no input symbols within distance S appear within a distance of S in the output), or contention-free quadratic permutation polynomial (QPP) interleaving, for example.

At block <NUM>, the interleaved code block may be concatenated with other interleaved code blocks and allocated to one or more OFDM symbols. Such concatenation may be performed using a buffer, for example, and allocation to the OFDM symbols performed according to resource allocations associated with the OFDM symbols. In some examples, allocation may be made through identifying a resource allocation of wireless resources for transmission of the code blocks, the resource allocation including an allocation of the plurality of OFDM symbols, a plurality of REs within each OFDM symbol, and a set of spatial layers within each RE. Allocations may be performed, in some examples, by first mapping the interleaved code block data to one or more spatial layers within a same RE, then mapping the interleaved code block data to a plurality of REs within an OFDM symbol, and finally mapping the interleaved code blocks data to the plurality of OFDM symbols.

At block <NUM>, the base station <NUM>-b may perform symbol-level interleaving at the modulation symbol level within each OFDM symbol. The symbol-level interleaving may include interleaving to provide frequency diversity for data within the OFDM symbol. In some examples, a linear interleaver is used for symbol-level interleaving, to provide the uniform distribution of data throughout an allocated frequency bandwidth, although other types of interleaving may be used similarly as discussed above.

The base station <NUM>-b may then transmit downlink communication <NUM> to the UE <NUM>-b. The UE <NUM>-b may receive the downlink communication <NUM> at one or more receive antennas and associated RF components, and demodulate the downlink communication <NUM> into a plurality of OFDM symbols to obtain interleaved OFDM symbol data for each transmitted OFDM symbol. The UE <NUM>-b may, at block <NUM>, perform symbol-level deinterleaving of the interleaved OFDM symbol data to obtain deinterleaved OFDM symbol data.

At block <NUM>, the UE <NUM>-b may perform symbol concatenation/allocation for the OFDM symbols of the transmitted code block to obtain interleaved code block data of the transmitted code block. The UE <NUM>-b may then, at block <NUM>, perform code block level deinterleaving the interleaved code block data to obtain deinterleaved code block data, which may be decoded according to the coding applied at the base station <NUM>-b (e.g., turbo decoding or LDPC decoding).

In some examples, the downlink communication <NUM> may include signaling indicating whether the transmitted code block contains interleaved code block data and interleaved OFDM symbol data. In such cases, the UE <NUM>-b may perform a legacy single stage deinterleaving of parity data within the transmitted code block when the signaling does not indicate that the transmitted code block contains interleaved OFDM symbol data, and may perform the dual-stage deinterleaving/decoding when the signaling does indicate that the transmitted code block contains interleaved OFDM symbol data.

<FIG> shows a diagram <NUM> of a wireless device <NUM> that supports dual stage channel interleaving for data transmission in accordance with various aspects of the present disclosure. Wireless device <NUM> may be an example of aspects of a base station <NUM> as described with reference to <FIG>. Wireless device <NUM> may include receiver <NUM>, base station communications manager <NUM>, and transmitter <NUM>. Wireless device <NUM> may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

Receiver <NUM> 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 dual stage channel interleaving for data transmission, etc.). Information may be passed on to other components of the device. The receiver <NUM> may be an example of aspects of the transceiver <NUM> described with reference to <FIG>.

Base station communications manager <NUM> may be an example of aspects of the base station communications manager <NUM> described with reference to <FIG>. Base station communications manager <NUM> may identify code block data to be transmitted in a code block to a receiver, interleave the code block data to generate interleaved code block data, concatenate interleaved code block data from different code blocks sequentially, allocate the concatenated interleaved code block data into OFDM symbols sequentially, and interleave the concatenated interleaved code block data allocated into each OFDM symbol to generate interleaved OFDM symbol data to be transmitted in each OFDM symbol. The base station communications manager <NUM>, in some cases, may additionally or alternatively identify code block data to be transmitted in a code block to a receiver, allocate the code block data into a set of OFDM symbols, and interleave the code block data allocated into the OFDM symbols to generate interleaved OFDM symbol data for the OFDM symbols. In some examples, the base station communications manager <NUM> may interleave the code block data allocated into each of the OFDM symbols to generate interleaved OFDM symbol data for each of the OFDM symbols.

Transmitter <NUM> may transmit the OFDM symbols to the receiver and transmit the set of other OFDM symbols of the code block to the receiver.

<FIG> shows a diagram <NUM> of a wireless device <NUM> that supports dual stage channel interleaving for data transmission in accordance with various aspects of the present disclosure. Wireless device <NUM> may be an example of aspects of a wireless device <NUM> or a base station <NUM> as described with reference to <FIG> and <FIG>. Wireless device <NUM> may include receiver <NUM>, base station communications manager <NUM>, and transmitter <NUM>. Wireless device <NUM> may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

Base station communications manager <NUM> may be an example of aspects of the base station communications manager <NUM> described with reference to <FIG>. Base station communications manager <NUM> may also include code block encoder <NUM>, code block interleaver <NUM>, concatenation component <NUM>, resource allocation component <NUM>, and symbol data interleaver <NUM>.

Code block encoder <NUM> may identify code block data to be transmitted in a code block to a receiver. In some cases, the code block data includes turbo code encoded data, LDPC encoded data, or TBCC encoded data.

Code block interleaver <NUM> may interleave the code block data to generate interleaved code block data, which in some cases may provide interleaving systematic data and parity data within the code block data to provide a uniform distribution of the systematic data in time within the code block. In some cases, the code block interleaver <NUM> may perform a legacy no channel interleaving or single stage channel interleaving in an absence of receiving an indication that a receiver is capable of supporting two stage channel interleaving. In some cases, the interleaved code block data provides time diversity for the code block data and the interleaved OFDM symbol data provides frequency diversity for the code block data.

Concatenation component <NUM> may concatenate interleaved code block data from different code blocks sequentially. Such concatenation may be performed, in some examples, by adding sequential interleaved code block data to a buffer.

Resource allocation component <NUM> may allocate the concatenated interleaved code block data into OFDM symbols sequentially. In some cases, resource allocation component <NUM> may allocate interleaved code block data from multiple code blocks into a set of other OFDM symbols, and allocate the code block data into a set of OFDM symbols. In some cases, the allocating includes identifying a resource allocation of wireless resources for transmission of the code blocks, the resource allocation including an allocation of the set of OFDM symbols, a set of REs within each OFDM symbol, and a set of spatial layers within each RE.

Symbol data interleaver <NUM> may interleave the concatenated interleaved code block data allocated into each OFDM symbol to generate interleaved OFDM symbol data to be transmitted in each OFDM symbol. In some cases, the interleaved code block data and interleaved OFDM symbol data may allow pipelined implementation of decoding of the code blocks at the receiver. In some examples, two stage channel interleaving may be performed to generate the interleaved code block data and the interleaved OFDM symbol data when the code block data includes unicast data, and single stage interleaving may be used for broadcast data. In some cases, the interleaved OFDM symbol data provides frequency diversity for the code block data.

<FIG> shows a diagram <NUM> of a base station communications manager <NUM> that supports dual stage channel interleaving for data transmission in accordance with various aspects of the present disclosure. The base station communications manager <NUM> may be an example of aspects of a base station communications manager <NUM>, a base station communications manager <NUM>, or a base station communications manager <NUM> described with reference to <FIG>, <FIG>, and <FIG>. The base station communications manager <NUM> may include code block encoder <NUM>, code block interleaver <NUM>, concatenation component <NUM>, resource allocation component <NUM>, symbol data interleaver <NUM>, spatial layer mapping component <NUM>, tone mapping component <NUM>, symbol mapping component <NUM>, receiver capability component <NUM>, and traffic identification component <NUM>. Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses).

Code block interleaver <NUM> may interleave the code block data to generate interleaved code block data, which may include interleaving systematic data and parity data within the code block data to provide a uniform distribution of the systematic data in time within the code block. In some cases, receiver capability component <NUM> may indicate that a receiver is not capable of dual stage interleaving, and the code block interleaver may perform a legacy no channel interleaving or single stage channel interleaving in such cases. In some cases, the interleaved code block data provides time diversity for the code block data and the interleaved OFDM symbol data provides frequency diversity for the code block data.

Concatenation component <NUM> may concatenate interleaved code block data from different code blocks sequentially, similarly as discussed above.

Resource allocation component <NUM> may allocate the concatenated interleaved code block data into OFDM symbols sequentially. In some cases, the allocating includes identifying a resource allocation of wireless resources for transmission of the code blocks, the resource allocation including an allocation of the set of OFDM symbols, a set of REs within each OFDM symbol, and a set of spatial layers within each RE.

Symbol data interleaver <NUM> may interleave the concatenated interleaved code block data allocated into each OFDM symbol to generate interleaved OFDM symbol data to be transmitted in each OFDM symbol. In some cases, the interleaved OFDM symbol data provides frequency diversity for the code block data. In some cases, the interleaved OFDM symbol data allows for pipelined decoding of the code block at the receiver.

Spatial layer mapping component <NUM>, tone mapping component <NUM>, and symbol mapping component <NUM> may map code block data to provide for pipelined decoding of the code block data. In some cases, the spatial layer mapping component <NUM> may firstly map the interleaved code block data to one or more spatial layers within a same RE. Tone mapping component <NUM> may secondly map the interleaved code block data to a set of REs within an OFDM symbol. Symbol mapping component <NUM> may thirdly map the interleaved code blocks data to the set of OFDM symbols. Following the mapping, two stage interleaving may be used to generate the interleaved code block data and the interleaved OFDM symbol data (e.g., responsive to the receiver indicating that it is capable of supporting two stage interleaving).

Receiver capability component <NUM> may receive, from the receiver, an indication of whether the receiver is capable of supporting two stage channel interleaving. Such an indication may be received as part of RRC signaling during a connection establishment, for example.

Traffic identification component <NUM> may determine whether the code block data includes broadcast data to be transmitted to a set of receivers or unicast data to be transmitted to a single receiver and bypass the dual stage interleaving when the code block data includes broadcast data.

<FIG> shows a diagram of a system <NUM> including a device <NUM> that supports dual stage channel interleaving for data transmission in accordance with various aspects of the present disclosure. Device <NUM> may be an example of or include the components of wireless device <NUM>, wireless device <NUM>, or a base station <NUM> as described above, e.g., with reference to <FIG>, <FIG> and <FIG>. Device <NUM> may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including base station communications manager <NUM>, processor <NUM>, memory <NUM>, software <NUM>, transceiver <NUM>, antenna <NUM>, network communications manager <NUM>, and base station communications manager <NUM>. These components may be in electronic communication via one or more busses (e.g., bus <NUM>). Device <NUM> may communicate wirelessly with one or more UEs <NUM>.

Base station communications manager <NUM> may manage communications with other base station <NUM>, and may include a controller or scheduler for controlling communications with UEs <NUM> in cooperation with other base stations <NUM>. For example, the base station communications manager <NUM> may coordinate scheduling for transmissions to UEs <NUM> for various interference mitigation techniques such as beamforming or joint transmission. In some examples, base station communications manager <NUM> may provide an X2 interface within an LTE/LTE-A wireless communication network technology to provide communication between base stations <NUM>.

Processor <NUM> may include an intelligent hardware device, (e.g., a general-purpose processor, a digital signal processor (DSP), a central processing unit (CPU), a microcontroller, an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, processor <NUM> may be configured to operate a memory array using a memory controller. In other cases, a memory controller may be integrated into processor <NUM>. Processor <NUM> may be configured to execute computer-readable instructions stored in a memory to perform various functions (e.g., functions or tasks supporting dual stage channel interleaving for data transmission).

In some cases, the memory <NUM> may contain, among other things, a Basic Input-Output system (BIOS) which may control basic hardware and/or software operation such as the interaction with peripheral components or devices.

Software <NUM> may include code to implement aspects of the present disclosure, including code to support dual stage channel interleaving for data transmission. Software <NUM> may be stored in a non-transitory computer-readable medium such as system memory or other memory. In some cases, the software <NUM> may not be directly executable by the processor but may cause a computer (e.g., when compiled and executed) to perform functions described herein.

<FIG> shows a diagram <NUM> of a wireless device <NUM> that supports dual stage channel interleaving for data transmission in accordance with various aspects of the present disclosure. Wireless device <NUM> may be an example of aspects of a UE <NUM> as described with reference to <FIG>. Wireless device <NUM> may include receiver <NUM>, UE communications manager <NUM>, and transmitter <NUM>. Wireless device <NUM> may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

Receiver <NUM> 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 dual stage channel interleaving for data transmission, etc.). Information may be passed on to other components of the device. The receiver <NUM> may be an example of aspects of the transceiver <NUM> described with reference to <FIG>. Receiver <NUM> may, in some examples, receive a set of OFDM symbols of a transmitted code block.

UE communications manager <NUM> may be an example of aspects of the UE communications manager <NUM> described with reference to <FIG>. UE communications manager <NUM> may demodulate the set of OFDM symbols to obtain interleaved OFDM symbol data for the set of OFDM symbols, deinterleave the interleaved OFDM symbol data for the set of OFDM symbols to obtain deinterleaved OFDM symbol data for the set of OFDM symbols, concatenate the deinterleaved OFDM symbol data for the set of OFDM symbols of the transmitted code block to obtain interleaved code block data of the transmitted code block, deinterleave the interleaved code block data to obtain deinterleaved code block data, and decode the deinterleaved code block data. In some examples, UE communications manager <NUM> may demodulate the set of OFDM symbols to obtain interleaved OFDM symbol data for each of the set of OFDM symbols, deinterleave the interleaved OFDM symbol data for each of the set of OFDM symbols to obtain deinterleaved OFDM symbol data for each of the set of OFDM symbols, concatenate the deinterleaved OFDM symbol data for each of the set of OFDM symbols of the transmitted code block to obtain interleaved code block data of the transmitted code block, deinterleave the interleaved code block data to obtain deinterleaved code block data, and decode the deinterleaved code block data.

<FIG> shows a diagram <NUM> of a wireless device <NUM> that supports dual stage channel interleaving for data transmission in accordance with various aspects of the present disclosure. Wireless device <NUM> may be an example of aspects of a wireless device <NUM> or a UE <NUM> as described with reference to <FIG> and <FIG>. Wireless device <NUM> may include receiver <NUM>, UE communications manager <NUM>, and transmitter <NUM>. Wireless device <NUM> may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

UE communications manager <NUM> may be an example of aspects of the UE communications manager <NUM> described with reference to <FIG>. UE communications manager <NUM> may also include demodulation component <NUM>, symbol data deinterleaver <NUM>, concatenation component <NUM>, code block deinterleaver <NUM>, and code block decoder <NUM>.

Demodulation component <NUM> may demodulate the set of OFDM symbols to obtain interleaved OFDM symbol data for each of a set of OFDM symbols.

Symbol data deinterleaver <NUM> may deinterleave the interleaved OFDM symbol data for the set of OFDM symbols to obtain deinterleaved OFDM symbol data. In some examples, data deinterleaver <NUM> may deinterleave the interleaved OFDM symbol data for all of the set of OFDM symbols to obtain deinterleaved OFDM symbol data. Such deinterleaving may be performed using a linear deinterleaver, for example, although other types of deinterleavers may be used based on a type of interleaving used for the interleaved OFDM symbol data, as discussed above.

Concatenation component <NUM> may concatenate the deinterleaved OFDM symbol data for the set of OFDM symbols of the transmitted code block to obtain interleaved code block data of the transmitted code block. In some cases, concatenation component <NUM> may concatenate the deinterleaved OFDM symbol data for one or more of the set of OFDM symbols of the transmitted code block to obtain interleaved code block data of the transmitted code block. Concatenation may include, for example, adding the deinterleaved OFDM symbol data for the set of OFDM symbols to a buffer.

Code block deinterleaver <NUM> may deinterleave the interleaved code block data to obtain deinterleaved code block data. Such deinterleaving may be performed using a linear deinterleaver, for example, although other types of deinterleavers may be used based on a type of interleaving used for the interleaved OFDM symbol data, as discussed above. In some examples, code block deinterleaver <NUM> may perform a legacy single stage deinterleaving of parity data within the transmitted code block when signaling does not indicate that the transmitted code block contains interleaved OFDM symbol data.

Code block decoder <NUM> may decode the deinterleaved code block data. In some cases, the interleaved code block data includes interleaved systematic data and parity data within the code block, and where the systematic data is uniformly distributed throughout the interleaved code block data. In some cases, the interleaved code block data provides time diversity for the deinterleaved code block data and the interleaved OFDM symbol data provides frequency diversity for the deinterleaved code block data. In some cases, the decoding the deinterleaved code block data includes decoding of turbo code encoded data, LDPC encoded data, or TBCC encoded data. In some cases, the decoding the deinterleaved code block data includes pipelined decoding of the code block.

<FIG> shows a diagram <NUM> of a UE communications manager <NUM> that supports dual stage channel interleaving for data transmission in accordance with various aspects of the present disclosure. The UE communications manager <NUM> may be an example of aspects of a UE communications manager <NUM> described with reference to <FIG>, <FIG>, and <FIG>. The UE communications manager <NUM> may include demodulation component <NUM>, symbol data deinterleaver <NUM>, concatenation component <NUM>, code block deinterleaver <NUM>, code block decoder <NUM>, and symbol interleaving identification component <NUM>. Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses).

Demodulation component <NUM> may demodulate the set of OFDM symbols to obtain interleaved OFDM symbol data for the set of OFDM symbols. In some cases, the set of OFDM symbols may be demodulated to obtain interleaved OFDM symbol data for at least one of the set of OFDM symbols.

Symbol data deinterleaver <NUM> may deinterleave the interleaved OFDM symbol data for each of the set of OFDM symbols to obtain deinterleaved OFDM symbol data for each of the set of OFDM symbols. Such deinterleaving may be performed using a linear deinterleaver, for example, although other types of deinterleavers may be used based on a type of interleaving used for the interleaved OFDM symbol data, as discussed above.

Concatenation component <NUM> may concatenate the deinterleaved OFDM symbol data for each of the set of OFDM symbols of the transmitted code block to obtain interleaved code block data of the transmitted code block. Concatenation may include, for example, adding the deinterleaved OFDM symbol data for each of the set of OFDM symbols to a buffer.

Code block deinterleaver <NUM> may deinterleave the interleaved code block data to obtain deinterleaved code block data. In examples where signaling does not indicate that the transmitted code block contains interleaved OFDM symbol data, the code block deinterleaver <NUM> may perform a legacy single stage deinterleaving of parity data within the transmitted code block. Such deinterleaving may be performed using a linear deinterleaver, for example, although other types of deinterleavers may be used based on a type of interleaving used for the interleaved OFDM symbol data, as discussed above.

Symbol interleaving identification component <NUM> may transmit an indication to a transmitter of the transmitted code block that indicates capability for supporting the two stage channel interleaving and receive signaling indicating whether the transmitted code block contains interleaved code block data and interleaved OFDM symbol data.

<FIG> shows a diagram of a system <NUM> including a device <NUM> that supports dual stage channel interleaving for data transmission in accordance with various aspects of the present disclosure. Device <NUM> may be an example of or include the components of UE <NUM> as described above, e.g., with reference to <FIG>. Device <NUM> may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including UE communications manager <NUM>, processor <NUM>, memory <NUM>, software <NUM>, transceiver <NUM>, antenna <NUM>, and I/O controller <NUM>. These components may be in electronic communication via one or more busses (e.g., bus <NUM>). Device <NUM> may communicate wirelessly with one or more base stations <NUM>.

Processor <NUM> may include an intelligent hardware device, (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, processor <NUM> may be configured to operate a memory array using a memory controller. In other cases, a memory controller may be integrated into processor <NUM>. Processor <NUM> may be configured to execute computer-readable instructions stored in a memory to perform various functions (e.g., functions or tasks supporting dual stage channel interleaving for data transmission).

I/O controller <NUM> may additionally or alternatively manage peripherals not integrated into device <NUM>.

<FIG> shows a flowchart illustrating a method <NUM> for dual stage channel interleaving for data transmission in accordance with various aspects of the present disclosure. The operations of method <NUM> may be implemented by a base station <NUM>, a UE <NUM>, or its components as described herein. For example, the operations of method <NUM> may be performed by a base station communications manager as described with reference to <FIG>. In some examples, a base station <NUM> or UE <NUM> may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the base station <NUM> or UE <NUM> may perform aspects the functions described below using special-purpose hardware.

At block <NUM> the base station <NUM> or UE <NUM> may identify code block data to be transmitted in a code block to a receiver. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a code block encoder as described with reference to <FIG>.

At block <NUM> the base station <NUM> or UE <NUM> may interleave the code block data to generate interleaved code block data. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a code block interleaver as described with reference to <FIG>.

At block <NUM> the base station <NUM> or UE <NUM> may concatenate interleaved code block data from different code blocks sequentially. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a concatenation component as described with reference to <FIG>.

At block <NUM> the base station <NUM> or UE <NUM> may allocate the concatenated interleaved code block data into OFDM symbols sequentially. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a resource allocation component as described with reference to <FIG>.

At block <NUM> the base station <NUM> or UE <NUM> may interleave the concatenated interleaved code block data allocated into each OFDM symbol to generate interleaved OFDM symbol data to be transmitted in each OFDM symbol. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a symbol data interleaver as described with reference to <FIG>.

At block <NUM> the base station <NUM> or UE <NUM> may transmit the OFDM symbols to the receiver. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a transmitter as described with reference to <FIG>.

<FIG> shows a flowchart illustrating a method <NUM> for dual stage channel interleaving for data transmission in accordance with various aspects of the present disclosure. The operations of method <NUM> may be implemented by a base station <NUM> or its components as described herein. For example, the operations of method <NUM> may be performed by a base station communications manager as described with reference to <FIG>. In some examples, a base station <NUM> may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the base station <NUM> may perform aspects the functions described below using special-purpose hardware.

At block <NUM> the base station <NUM> may allocate interleaved code block data from multiple code blocks into a set of OFDM symbols. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a resource allocation component as described with reference to <FIG>.

At block <NUM> the base station <NUM> may interleave, for each of the set of OFDM symbols, the associated portion of the interleaved code block data to generate interleaved OFDM symbol data for each of the set of OFDM symbols. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a symbol data interleaver as described with reference to <FIG>.

At block <NUM> the base station <NUM> may transmit the set of OFDM symbols of the code block to the receiver. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a transmitter as described with reference to <FIG>.

At block <NUM> the base station <NUM> may firstly map the interleaved code block data to one or more spatial layers within a same RE. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a spatial layer mapping component as described with reference to <FIG>.

At block <NUM> the base station <NUM> may secondly map the interleaved code block data to a plurality of REs within an OFDM symbol. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a tone mapping component as described with reference to <FIG>.

At block <NUM> the base station <NUM> may thirdly map the interleaved code blocks data to the plurality of OFDM symbols. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a symbol mapping component as described with reference to <FIG>.

At block <NUM> the base station <NUM> may receive, from the receiver, an indication of whether the receiver is capable of supporting two stage channel interleaving. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a receiver capability component as described with reference to <FIG>.

At block <NUM> the base station <NUM> may perform two stage interleaving to generate the interleaved code block data and the interleaved OFDM symbol data responsive to the receiver indicating that it is capable of supporting two stage interleaving. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a symbol mapping component as described with reference to <FIG>.

At block <NUM> the base station <NUM> may identify code block data to be transmitted in a code block to a receiver. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a code block encoder as described with reference to <FIG>.

At block <NUM> the base station <NUM> may determine whether the code block data includes broadcast data to be transmitted to a plurality of receivers or unicast data to be transmitted to a single receiver. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a traffic identification component as described with reference to <FIG>.

At block <NUM> the base station <NUM> may perform two stage channel interleaving to generate the interleaved code block data and the interleaved OFDM symbol data when the code block data includes unicast data. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a symbol data interleaver as described with reference to <FIG>.

At block <NUM> the base station <NUM> may bypass the interleaving to generate the interleaved code block data and the interleaved OFDM symbol data when the code block data includes broadcast data. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a traffic identification component as described with reference to <FIG>.

<FIG> shows a flowchart illustrating a method <NUM> for dual stage channel interleaving for data transmission in accordance with various aspects of the present disclosure. The operations of method <NUM> may be implemented by a UE <NUM> or its components as described herein. For example, the operations of method <NUM> may be performed by a UE communications manager as described with reference to <FIG>. In some examples, a UE <NUM> may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the UE <NUM> may perform aspects the functions described below using special-purpose hardware.

At block <NUM> the UE <NUM> may receive a plurality of OFDM symbols of a transmitted code block. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a receiver as described with reference to <FIG>.

At block <NUM> the UE <NUM> may demodulate the plurality of OFDM symbols to obtain interleaved OFDM symbol data for each of the plurality of OFDM symbols. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a demodulation component as described with reference to <FIG>.

At block <NUM> the UE <NUM> may deinterleave the interleaved OFDM symbol data for each of the plurality of OFDM symbols to obtain deinterleaved OFDM symbol data for each of the plurality of OFDM symbols. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a symbol data deinterleaver as described with reference to <FIG>.

At block <NUM> the UE <NUM> may concatenate the deinterleaved OFDM symbol data for each of the plurality of OFDM symbols of the transmitted code block to obtain interleaved code block data of the transmitted code block. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a concatenation component as described with reference to <FIG>.

At block <NUM> the UE <NUM> may deinterleave the interleaved code block data to obtain deinterleaved code block data. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a code block deinterleaver as described with reference to <FIG>.

At block <NUM> the UE <NUM> may decode the deinterleaved code block data. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a code block decoder as described with reference to <FIG>.

At block <NUM> the UE <NUM> may transmit an indication to a transmitter of the transmitted code block that indicates capability for supporting the two stage channel interleaving. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a symbol interleaving identification component as described with reference to <FIG>.

At block <NUM> the UE <NUM> may receive a set of OFDM symbols of a transmitted code block. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a receiver as described with reference to <FIG>.

At block <NUM> the UE <NUM> may demodulate the set of OFDM symbols to obtain interleaved OFDM symbol data for each of the set of OFDM symbols. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a demodulation component as described with reference to <FIG>.

At block <NUM> the UE <NUM> may deinterleave the interleaved OFDM symbol data for each of the set of OFDM symbols to obtain deinterleaved OFDM symbol data for each of the set of OFDM symbols. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a symbol data deinterleaver as described with reference to <FIG>.

At block <NUM> the UE <NUM> may concatenate the deinterleaved OFDM symbol data for each of the set of OFDM symbols of the transmitted code block to obtain interleaved code block data of the transmitted code block. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a concatenation component as described with reference to <FIG>.

At block <NUM> the UE <NUM> may receive signaling indicating whether the transmitted code block contains dual stage interleaving with interleaved code block data and interleaved OFDM symbol data. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a symbol interleaving identification component as described with reference to <FIG>.

At block <NUM> the UE <NUM> may perform a legacy single stage deinterleaving of parity data within the transmitted code block when the signaling does not indicate that the transmitted code block contains interleaved OFDM symbol data. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a code block deinterleaver as described with reference to <FIG>.

At block <NUM> the UE <NUM> may perform the deinterleaving the interleaved OFDM symbol data, concatenating, and deinterleaving the interleaved code block data when the signaling does indicate that the transmitted code block contains interleaved OFDM symbol data. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a symbol data deinterleaver as described with reference to <FIG>.

At block <NUM> the base station <NUM> may allocate the code block data into a plurality of OFDM symbols. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a resource allocation component as described with reference to <FIG>.

At block <NUM> the base station <NUM> may interleave the code block data allocated into each of the OFDM symbols to generate interleaved OFDM symbol data for each of the OFDM symbols. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a symbol data interleaver as described with reference to <FIG>.

At block <NUM> the base station <NUM> may transmit the OFDM symbols to the receiver. The operations of block <NUM> may be performed according to the methods described with reference to <FIG>. In some examples, aspects of the operations of block <NUM> may be performed by a transmitter as described with reference to <FIG>.

Techniques described herein may be used for various wireless communications systems such as CDMA, TDMA, FDMA, OFDMA, single carrier frequency division multiple access (SC-FDMA), and other systems. The terms "system" and "network" are often used interchangeably.

An OFDMA system may implement a radio technology such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), Institute of Electrical and Electronics Engineers (IEEE) <NUM> (Wi-Fi), IEEE <NUM> (WiMAX), IEEE <NUM>, Flash-OFDM, etc. UTRA and E-UTRA are part of Universal Mobile Telecommunications system (UMTS). 3GPP LTE and LTE-Advanced (LTE-A) are new releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from the organization named "3rd Generation Partnership Project" (3GPP). While aspects an LTE system may be described for purposes of example, and LTE terminology may be used in much of the description, the techniques described herein are applicable beyond LTE applications.

In LTE/LTE-A networks, including such networks described herein, the term eNB may for example be used to describe the base stations. The wireless communications system or systems described herein may include a heterogeneous LTE/LTE-A network in which different types of eNBs provide coverage for various geographical regions. For example, each eNB or base station may provide communication coverage for a macro cell, a small cell, or other types of cell. The term "cell" may be used to describe a base station, a carrier or component carrier associated with a base station, or a coverage area (e.g., sector, etc.) of a carrier or base station, depending on context.

Base stations may include or may be referred to by those skilled in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, eNB, Home NodeB, a Home eNodeB, or some other suitable terminology. The geographic coverage area for a base station may be divided into sectors making up a portion of the coverage area. The wireless communications system or systems described herein may include base stations of different types (e.g., macro or small cell base stations). The UEs described herein may be able to communicate with various types of base stations and network equipment including macro eNBs, small cell eNBs, relay base stations, and the like. There may be overlapping geographic coverage areas for different technologies.

A femto cell may additionally or alternatively cover a small geographic area (e.g., a home) and may provide restricted access by UEs having an association with the femto cell (e.g., UEs in a closed subscriber group (CSG), UEs for users in the home, and the like). A UE may be able to communicate with various types of base stations and network equipment including macro eNBs, small cell eNBs, relay base stations, and the like.

The downlink transmissions described herein may additionally or alternatively be called forward link transmissions while the uplink transmissions may additionally or alternatively be called reverse link transmissions.

In some instances, well-known structures and devices are shown in diagram form in order to avoid obscuring the concepts of the described examples.

Other examples and implementations are within the scope of the appended claims. Also, as used herein, including in the claims, "or" as used in a list of items (for example, a list of items prefaced by a phrase such as "at least one of" or "one or more of") indicates a disjunctive list such 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).

As used herein, the phrase "based on" shall not be construed as a reference to a closed set of conditions. For example, an exemplary step that is described as "based on condition A" may be based on both a condition A and a condition B without departing from the scope of the appended claims.

By way of example, and not limitation, non-transitory computer-readable media can comprise RAM, ROM, electrically erasable programmable read only memory (EEPROM), compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.

Claim 1:
A method (<NUM>) for wireless communication performed by a transmitter, comprising:
receiving, from the receiver, an indication of whether a receiver is capable of supporting two stage channel interleaving;
identifying (<NUM>) code block data to be transmitted in a code block to the receiver;
interleaving (<NUM>), as a first step of the two stage channel interleaving, the code block data to generate interleaved code block data;
concatenating (<NUM>) interleaved code block data from different code blocks sequentially;
allocating (<NUM>) the concatenated interleaved code block data into orthogonal frequency division multiplexing, OFDM, symbols sequentially;
interleaving (<NUM>), as a second step of the two stage channel interleaving, the concatenated interleaved code block data allocated into each OFDM symbol to generate interleaved OFDM symbol data to be transmitted in each OFDM symbol; and
transmitting (<NUM>) the OFDM symbols to the receiver,
wherein:
if the indication indicates the receiver is capable of supporting two stage interleaving, performing the two stage interleaving to generate the interleaved code block data and the interleaved OFDM symbol data; or
if the indication indicates the receiver is not capable of supporting the two stage interleaving, performing single stage channel interleaving, instead of performing the first and second steps of the two stage interleaving,
wherein the single stage channel interleaving performs interleaving parity data within the code block data.