TWI626839B - High-efficiency (he) communication station and method for communicating longer duration ofdm symbols within 40 mhz and 80 mhz bandwidth allocations - Google Patents

Abstract

Embodiments of a high performance (HE) communication station and method for high performance (HE) communication in a wireless network are generally described herein. The HE station can transmit 4x (4x) longer delay orthogonal frequency division multiplexing (OFDM) symbols on the channel resources according to an orthogonal frequency division multiplexing access (OFDMA) technique. The channel resources may include one or more resource allocation units, each resource allocation unit having a predetermined number of data subcarriers. The station may also group the resource allocation units for one of a plurality of interleaver configurations in accordance with one of a plurality of subcarrier allocations. The station can be used by a 512-point Fast Fourier Transform (FFT) for communication over a 40 MHz channel bandwidth including a 40 MHz resource allocation unit, and by a 1024-point fast Fourier transform. The communication over an 80 MHz channel bandwidth comprising either of the two 40 MHz resource allocation units or an 80 MHz resource allocation unit, thus processing the longer delay orthogonal frequency division multiplex symbols.

Description

Used to transmit longer delay orthogonal frequency division multiplexing in the bandwidth allocation of 40MHZ and 80MHZ (OFDM) symbol high performance (HE) communication station and method Field of invention

Embodiments relate to wireless networks. Some embodiments are directed to a wireless local area network (WLAN) and a Wi-Fi network that operate over a network in accordance with the IEEE 802.11 family of standards. Some embodiments relate to the High Efficiency WLAN Research Group (HEW SG) (referred to as DensiFi) and to the IEEE 802.11ax SG. Some embodiments relate to high performance (HE) wireless communication including HE Wi-Fi communication and high performance WLAN (HEW) communication.

Background of the invention

Wireless communication is continually increasing the data rate (eg, from IEEE 802.11a/g to IEEE 802.11n to IEEE 802.11ac). In high-density configurations, the overall system performance may be more important than the higher data rate. For example, in high-density hotspots and mobile phone offload scenarios, many devices competing for wireless media may have low to moderate data rate requirements (relatively high data rates relative to IEEE 802.11ac). Used to contain very The high-transmission (VHT) communication and the traditional IEEE 802.11 communication framework may not be suitable for such high-density configurations. The task population for high-performance WLANs, recently formed and known as IEEE 802.11ax, is processing these high-density configuration scenarios.

One problem with HEW is to define communication structures that can be reused with at least some of the IEEE 802.11ac hardware, such as tone allocation and block interleaver circuits. Another problem with HEW is to define an efficient communication structure that is suitable for use with longer OFDM symbol delays, especially with a delay of four times (4x) longer or longer than the standard (1x) symbol delay. OFDM symbol. Another problem with HEW is to define an efficient communication structure that is suitably used to pass longer OFDM symbol delays over a wider bandwidth (e.g., 40 MHz and 80 MHz bandwidth).

Therefore, there is a general need for apparatus and methods that are useful for improving overall system performance in wireless networks, especially for high density configurations. At the same time, there is also a general need for devices and methods suitable for HEW communication. At the same time, there is generally a need for an apparatus and method suitable for HEW communication that can communicate in accordance with an effective communication structure and at least some of the hardware that can be reused. At the same time, there is generally also a need for an apparatus and method suitable for HEW communication that can be used in accordance with an effective communication structure for using a longer delay OFDM symbol, which is suitably used to transmit a wider bandwidth. (for example, 40 MHz and 80 MHz bandwidth) while passing a longer OFDM symbol delay.

According to an embodiment of the present invention, a high performance (HE) is specifically proposed. a communication station (STA) comprising a physical layer and a media access control layer circuit for transmitting a longer delay orthogonal frequency division multiplexing on a channel resource according to an orthogonal frequency division multiplexing access (OFDMA) technique (OFDM) symbols, the channel resources include one or more resource allocation units, each resource allocation unit includes a predetermined number of data subcarriers; and the resource allocation units are configured for use according to one of a plurality of subcarrier allocations for Communication of the longer delay orthogonal frequency division multiplex symbols; and processing the longer delay orthogonal frequency division multiplex symbols by at least one of: a 512 point fast Fourier transform (FFT), which is used Communication over a 40 MHz channel bandwidth comprising a 40 MHz resource allocation unit; and a 1024-point fast Fourier transform for one of the two 40 MHz resource allocation units or an 80 MHz resource allocation unit Communication over the bandwidth of the 80MHz channel.

100‧‧‧HEW Network

102‧‧‧Main station

104‧‧‧HEW device

106‧‧‧Traditional platform

200‧‧‧ physical layer circuit

208‧‧‧Encoder

214‧‧‧Interlacer

216‧‧‧Distribution Mapper

218‧‧‧FFT processing circuit

300‧‧‧HEW device

301‧‧‧Antenna

302‧‧‧ physical layer circuit

304‧‧‧Media access control layer circuit

306‧‧‧Processing Circuit

308‧‧‧ memory

400~408‧‧‧Steps for transmitting longer delay OFDM symbols

1 illustrates a HEW network in accordance with some embodiments; FIG. 2 is a block diagram of a physical layer of a portion of a HEW communication station in accordance with some embodiments; FIG. 3 illustrates a HEW device in accordance with some embodiments; Some steps are used to pass the resource allocation unit in accordance with some embodiments.

Detailed description of the preferred embodiment

The following description and the drawings are illustrative of specific embodiments in which the invention can be practiced by those skilled in the art. Other embodiments may incorporate structural, logical, electrical, processing, and other changes. Some embodiments Portions and features may be included in, or substituted for, the counterparts in other embodiments. The examples mentioned in the scope of the patent application include all possible equivalents of those claims.

FIG. 1 illustrates a HEW network in accordance with some embodiments. The HEW network 100 can include a primary station (STA) 102, a plurality of HEW stations 104 (HEW devices), and a plurality of legacy stations 106 (legacy devices). The primary station 102 can be configured to communicate with the HEW stations 104 and the legacy stations 106 in accordance with one or more IEEE 802.11 standards. According to some HEW embodiments, the primary station 102 can be configured to compete for a wireless medium (e.g., during a contention period) to receive dedicated control of the medium during a HEW control period (i.e., a transmission opportunity (TXOP) ). The primary station 102 can, for example, transmit a primary synchronization or control transmission at the beginning of the HEW control period to indicate which HEW stations 104 are scheduled for communication during the HEW control period. During the HEW control period, the scheduled HEW stations 104 can communicate with the primary station 102 in accordance with a non-competitive based multi-access technology. This is different from Wi-Fi communication, in which the device communicates based on a competition-based communication technology rather than a non-competitive multi-access technology. During the HEW control period, the primary station 102 can communicate with the HEW station 104 (e.g., using one or more HEW frames). The legacy station 106 can avoid delivery during this HEW control cycle. In some embodiments, the primary synchronous transmission may be referred to as a control and scheduled transmission.

In some embodiments, the multiple access technology used during the HEW control period may be a one-way orthogonal frequency division multiplexing access (OFDMA) technology, although this is not necessary. In some embodiments, the multiple access technique may be a Time Division Multiple Access (TDMA) technique, or a Frequency Division Multiple Access (FDMA) technique, which may be combined with OFDMA. In some embodiments, the multiple access technique may include a spatial division multiple access (SDMA) technique of multiple user (MU) multiple input multiple output (MIMO) (MU-MIMO) technology, which may be combined with OFDMA . These multiple access techniques used during the HEW control period can be configured for uplink or downlink data communication. OFDMA simultaneously enables multiplexing of different users for improved performance.

The primary station 102 can also communicate with the legacy station 106 (outside the control cycle) in accordance with conventional IEEE 802.11 communication techniques. In some embodiments, the primary station 102 may also be configurable to communicate with the HEW station 104 outside of the control period in accordance with conventional IEEE 802.11 communication techniques, although this is not required.

In some embodiments, the HEW communication during the control period may be a bandwidth that can be combined to have one of 20 MHz, 40 MHz, or 80 MHz continuous bandwidth or an 80+80 MHz (160 MHz) discontinuous bandwidth. In some embodiments, a 320 MHz channel bandwidth can be used. In some embodiments, subchannel bandwidths less than 20 MHz may also be used. In these embodiments, each channel or sub-channel of a HEW communication can be configured to transmit a plurality of spatial streams. The HEW communication during the control period may be uplink or downlink communication.

Some embodiments disclosed herein provide systems and methods for subcarrier (e.g., tone) allocation in a HEW network. For some implementations In an example, the primary station 102 or the HEW station 104 can assign tones to provide a minimum OFDMA bandwidth unit (i.e., a resource allocation unit). In some embodiments, the primary station 102 or HEW station 104 can be configured to communicate longer delay orthogonal frequency division multiplexing (OFDM) symbols on channel resources including one or more resource allocation units. Each resource allocation unit can have a predetermined bandwidth, and the resource allocation units can be grouped for one of a plurality of interleaver configurations based on one of a plurality of subcarrier allocations. In some embodiments, the best subcarrier allocation and interleaver size combination is provided for use by an OFDMA resource allocation unit for communication of longer delay OFDM symbols. These embodiments are discussed in more detail below. Some embodiments disclosed herein are applicable to communications using longer delay OFDM symbols (e.g., having a 4x symbol delay or longer), although the scope of the embodiments is not limited in this respect. Some embodiments disclosed herein are applicable to communication using larger Fast Fourier Transform (FFT) scales, although the scope of the embodiments is not limited in this respect.

In accordance with an embodiment, an HEW station (e.g., primary station 102 or a HEW station 104) can be configured to communicate longer delay OFDM symbols on channel resources in accordance with an OFDMA technique. The channel resource may include one or more resource allocation units, and each resource allocation unit may have a predetermined number of data subcarriers. The longer delay OFDM symbols may have a symbol delay of a standard OFDM symbol delay of 4x (ie, symbol time (eg, T _symbol )). The resource allocation units can be configured for one of a plurality of interleaver configurations based on one of a plurality of subcarrier assignments. These embodiments are discussed in more detail below. Some embodiments disclosed herein may be applicable to IEEE 802.11ax and operate a longer OFDM symbol delay (eg, four times the standard symbol delay (4x)) HEW network, although the scope of the embodiments is not limited In this argument.

As discussed in more detail below, a HEW primary station 102 and a HEW station 104 may include physical layer (PHY) and media access control (MAC) layer circuits. In some embodiments, the PHY circuit can include a block interleaver having a depth of one OFDM symbol. The block interleaver can be a block that can be configured to interleave encoded data in accordance with any of the plurality of interleaver configurations. The interleaver configurations can include several rows and columns. These embodiments are discussed in more detail below.

2 is a block diagram of a physical layer of a portion of a HEW communication station in accordance with some embodiments. PHY layer circuit 200 may be part of a physical layer suitable for use as a HEW communication station (e.g., primary station 102 (FIG. 1) and/or HEW communication station 104 (FIG. 1). As illustrated in FIG. 2, the PHY layer circuit 200 can include one or more encoders 208, one or more block interleavers 214, one or more distribution mappers 216, and FFT processing circuits 218. Each of the encoders 208 can be configured to encode the input data prior to interleaving by the interleaver 214. Each of the distribution mappers 216 can be configured to map the interleaved data to a distribution (e.g., a quadrature amplitude modulation (QAM) distribution) after interleaving. Each interleaver 214 can be configured to interleave one block of coded data in accordance with any of a plurality of interleaver configurations. In some embodiments, the encoders 208 may be binary convolutional code (BCC) encoders, although the scope of the embodiments is not limited in this respect. In some embodiments, the encoders 208 can be low density Parity check (LDPC) encoder. An FFT can be performed by the FFT processing circuit 218 on the distribution map symbols provided by the distribution mapper to generate a time domain signal for transmission by one or more antennas. In the embodiment in which BCC encoding is performed, the interleave processing is performed, and in the embodiment in which LDPC encoding is performed, the interleave processing is not performed.

In accordance with an embodiment, encoder 208 and mapper 216 operate for a particular subcarrier allocation (i.e., tone allocation) in accordance with one of a plurality of predetermined modulation and coding scheme (MCS) combinations. The plurality of predetermined MCS combinations for the subcarrier allocation may be coded bits (Ncbps) defined as one integer per OFDM symbol and an integer number of data bits (Ndbps) for each OFDM symbol. In these embodiments, the number of coded bits per OFDM symbol is an integer and the number of data bits per OFDM symbol is an integer. Assuming that both Ncbps and Ndbps are integers, the predetermined MCS combinations and subcarrier allocations that can be used may include the modulation order of BPSK, QPSK, 16-QAM, 64-QAM, and 256-QAM, and 1/2, 3 Coding rates of /4, 2/3 and 5/6. A non-integer Ndbps may result in a non-integer padding bit or a number of coding bits exceeding the number of OFDM symbols, which may cause an OFDM symbol to include only padding bits. An integer Ndbps can guarantee that all data lengths use IEEE 802.11n "number of OFDM symbols", and IEEE 802.11 2012 specifications (equations (20~32)) act without additional padding. Accordingly, some of the embodiments disclosed herein may be limited to certain MCS combinations and subcarrier allocations. In these embodiments, the interleaver hardware configuration is within the limits of one IEEE 802.11 interleaver that allows legacy IEEE 802.11 hardware blocks to be reused in HFW.

In some of these embodiments, prior to interleaving, the HEW communication stations 102/104 may be first configured to encode input data in accordance with a coding rate and may be combined to form a distribution map based on a modulation level as it is interleaved. Interleaved bits to QAM distribution points. The coding rate and modulation level may be one of a predetermined MCS combination for a particular subcarrier allocation. These embodiments are described in more detail below.

In some embodiments, each resource allocation unit may be configurable for communication between one and four spatial streams, although the scope of the embodiments is not limited in this respect. In these embodiments, an SDMA or MIMO technique can be used during the control cycle to pass the spatial streams. In some embodiments, each resource allocation unit can be a communication that can be configured for use in up to eight or more spatial streams.

Some embodiments disclosed herein provide for the size of several data subcarriers, several pilot subcarriers, and block interleaver for use in binary whirling code encoding. In some embodiments, the structure of the OFDMA waveform for IEEE 802.11ax, which is described in the U.S. Provisional Patent Application Serial No. 61/976,951, may be suitably used, although this is not essential. Some embodiments disclosed herein illustrate resource allocation units for OFDMA waveforms and illustrating subcarrier allocation. In some embodiments, the subcarrier allocation can be combined to reuse some IEEE 802.11ac hardware to produce a new OFDMA structure.

In accordance with some embodiments, a HEW communication station (e.g., primary station 102 or HEW station 104) can be configured to communicate longer delay OFDM symbols on channel resources in accordance with an OFDMA technique. These channel resources can One or more resource allocation units are included, and each resource allocation unit can include a predetermined number of data subcarriers. In some embodiments, the HEW communication station can assemble the resource allocation units for the longer delay OFDM symbols depending on one of a plurality of interleaver configurations for one of the plurality of subcarrier allocations communication. In these embodiments, the longer delay OFDM symbols may have a symbol delay that is four times (4x) longer than a standard OFDM symbol delay, and the station may be configurable to be different by Performing at least one of the fast Fourier transforms of the points: processing the longer delay OFDM symbols by a 512-point fast Fourier transform (FFT) for use in a 40 MHz channel bandwidth including a 40 MHz resource allocation unit The upper communication, and the longer delay OFDM symbols are processed by a 1024-point fast Fourier transform (FFT) for communication over an 80 MHz channel bandwidth. The 80 MHz channel bandwidth may include either of two 40 MHz resource allocation units or one 80 MHz resource allocation unit. These embodiments are discussed in more detail below. The FFT processing circuit 218 can be configured to perform 512-point fast Fourier transform (FFT) and 1024-point fast Fourier transform (FFT), and the like.

In some embodiments, when operating as a primary station 102, the communication station can be configured to process for a single user station (eg, a HEW station 104) using 512-point Fast Fourier Transform (FFT). The longer delay OFDM symbols are processed for communication within a 40 MHz resource allocation unit using a 1024-point Fast Fourier Transform (FFT) for a single user station to process the longer delay OFDM symbols for use in a Communication within the 80MHz resource allocation unit, and using 512 points fast Fourier transform (FFT) processes the longer delay orthogonal frequency division multiplex symbols for two user stations for communication within an 80 MHz resource allocation unit. In these embodiments, a user station can operate using one of the 80MHz bandwidths in the Basic Service Set (BSS) and can process 4x symbols using a 1024-point FFT. The user station can also operate using one of the 40MHz bandwidths in the Basic Service Set (BSS) and can process 4x symbols using a 512 point FFT. Although the embodiments described herein relate to a 4x symbol delay, in some alternative embodiments, a 512 point FFT can be used to process symbols having a 2x symbol delay within an 80 MHz resource allocation unit, and A 1024 point FFT can be used to process symbols having an 8x symbol delay within a 40 MHz resource allocation unit.

In some embodiments, to process longer delayed OFDM symbols by using a 1024-point fast Fourier transform (FFT) that does not have a 5/6 code rate mutual exclusion for 256 Quadrature Amplitude Modulation (QAM), The predetermined number of data subcarriers at the 80 MHz resource allocation unit may include 936 data subcarriers for one of the 26 rows of interleaver configurations, and 960 data bits for one or 15 rows of interleaver configurations. Carrier, 984 data subcarrier for interleaver configuration with 24 or 41 rows, and 990 data subcarrier for interleaver configuration with 22, 30 or 33 rows, although the scope of the embodiment is not Limited by this argument. These and other embodiments are described in greater detail below and illustrated in List III below.

For use in some embodiments to process the longer delay OFDM symbols by 512-point fast Fourier transform (FFT) without 5/6 code rate mutual exclusion for 256 Quadrature Amplitude Modulation (QAM), At 40MHz resource allocation The predetermined number of data subcarriers of the element may include one of: 468 data subcarriers for an interleaver configuration with 26 rows, 486 data subcarriers for an interleaver configuration with 18 or 27 rows . In these embodiments, the longer delayed OFDM symbols are processed by a 512 point fast Fourier transform (FFT) with a 5/6 code rate mutual exclusion for 256 Quadrature Amplitude Modulation (QAM), The predetermined number of data subcarriers for the 40 MHz resource allocation unit may include 490 data subcarriers having one of the 14 or 35 row interleaver configurations. These and other embodiments are described in greater detail below and illustrated in the VI list below.

In some embodiments, a HEW primary station 102 can be configured to process longer delay OFDM symbols received from one or two user stations in a 40 MHz resource allocation unit using 512-point fast Fourier transform. And processing a longer delayed OFDM symbol received from a user station in a 20 MHz resource allocation unit using a 256-point fast Fourier transform. In some of these embodiments, the longer delayed OFDM symbols are processed by 256-point fast Fourier transform without a code rate mutual exclusion, and the predetermined number of data subcarriers for the 20 MHz resource allocation unit may include One of the following: 234 data subcarriers for one of the 26 rows of interleaver configurations, 228 data subcarriers for one of the 19 rows of interleaver configurations, and for one of the 20 rows of interleaver Configured 240 data subcarriers. These and other embodiments are described in greater detail below and illustrated in the following list of VIII.

In some embodiments, a HEW master station 102 can also be assembled to process from two using 256-point Fast Fourier Transform (FFT). The longer delay OFDM symbol received by the user station within a 20 MHz resource allocation unit. Processing a predetermined number of data for a 20 MHz resource allocation unit for the longer delay OFDM symbols from two user stations without 5/6 code rate mutual exclusion for 256 Quadrature Amplitude Modulation (QAM) The subcarriers may include one of: 102 data subcarriers having an interleaver configuration of 6 or 17 rows, and 108 data subcarriers having an interleaver configuration of 18 rows. These and other embodiments are described in greater detail below and illustrated in List X below. For a longer delay OFDM symbol from two user stations with a code rate mutual exclusion of 5/6 for 256 quadrature amplitude modulation, the predetermined number of data subcarriers for the 20 MHz resource allocation unit may be For 104 data subcarriers with one of 13 lines of interleaver configuration. These and other embodiments are described in greater detail below and illustrated in List IX below.

In some embodiments, interleaver 214 (FIG. 2) may be a block interleaver having a depth of one OFDM symbol and may be configurable to interleave an encoded data block. The interleaver configurations can include a number of rows and a number of columns, wherein the number of columns is based on the number of coded bits per subcarrier of each stream. In some embodiments, encoder 208 can encode the input data prior to interleaving based on one of a plurality of code rates. The distribution mapper 216 can map the encoded material after interleaving to a QAM distribution. In some embodiments, encoder 208 and mapper 216 can operate in accordance with one of a plurality of predetermined modulation and coding scheme (MCS) combinations for subcarrier allocation. The plurality of predetermined MCS combinations for subcarrier allocation may be limited to one integer per OFDM symbol (Ncbps) A data bit that encodes a bit and an integer of one of each OFDM symbol (Ndbps).

In some embodiments, longer delay OFDM symbols may be selected for use in larger delay spread environments, and standard delayed OFDM symbols are selected for use in legacy communications or smaller delay extended environments. The standard delayed OFDM symbols can be used for legacy communications (eg, IEEE 802.11a/n/ac/g) and the symbol delay is not based on the delay spread of the channel. In some embodiments, the standard delayed OFDM symbols may have a symbol delay ranging from 3.6 microseconds (μs) including a short period of 400 nanoseconds (ns) to including 800 nanoseconds of protection. 4 microseconds of the interval. In some embodiments, the longer delay OFDM symbols have a symbol delay that is a delay of 4 times (4x) standard delayed OFDM symbols. In these embodiments, for example, when a 4x longer symbol delay is used in a 40 or 80 MHz resource allocation unit, the subcarrier spacing can be reduced by a factor of four (eg, a quarter of 312.5 kHz) ). In these embodiments, assigning one of the more subcarriers with more guard subcarriers can be used for the closer subcarrier spacing. In some embodiments, the primary station 102 can be configured to communicate simultaneously using a plurality of resource allocation units within the channel bandwidth.

In these embodiments, one of 1024-point Fast Fourier Transform (FFT) and 512-point Fast Fourier Transform (FFT) for operation in the 80 MHz and 40 MHz bandwidth of IEEE 802.11ax is detailed (eg, number of data subcarriers and The number of pilot subcarriers and the case of BCC coding for providing the size of the block interleaver are provided). The 1024-point fast Fourier transform (FFT) and the 512 point FFT system can have a 4x symbol delay to be used and especially in outdoor and indoor environments. In an outdoor environment, a four times longer symbol delay can enable the use of a more efficient cyclic prefix (CP) to overcome longer delay spreads. In indoor environments, longer symbol delays may allow for a more slack demand for one of the timing timing accuracy.

In order to determine a preferred configuration for data/pilot tone calculation and interleave size based on channel mode, MCS, and other parameters, system simulation is performed. Because the embodiments disclosed herein define pitch calculations, a detailed search within a range to achieve some reasonable pitch/pilot calculations and subcarrier allocation.

Some configurations for the number of data/pilot tone assignments have been proposed for the contribution of the IEEE 802.11ax SIG, but these proposals are not based on an exhaustive search within a range to achieve reasonable subcarrier allocation, which is also defined The size of the block interleaver used for BCC encoding. As discussed above, by introducing a new usage of HEWs targeted in a high-density configuration scenario, including a larger bandwidth scheduled via a HEW master station 102 or HEW access point (AP) Better control, improving the current Wi-Fi system and thus helping to meet the goals of the task force.

Some of the possible assignments (data, pilot, and block interleaver sizes) for each of the ethnic groups will be identified below and may be more beneficial for some subcarrier assignments to be identified. In an OFDMA system, the total number of subcarriers used in the minimum bandwidth unit can be a system design parameter. From the total number of subcarrier calculations, the OFDMA system has subcarriers, pilots that are assigned to the data (for use in the data) (usually used for time/frequency and frequency) Tracking), protection (for use to form a spectral mask), and subcarriers around DC and DC (to simplify direct conversion receiver design). For example, in IEEE 802.11ac at 20 MHz, the fixed subcarrier spacing is 312.5 kHz and thus the total number of subcarriers is 64. Of these 64 subcarriers, 52 subcarriers are designated for data, 1 subcarrier is used for direct current (assumed to be a virtual value), 4 subcarriers are used for pilots, and the remaining 7 subcarriers are used for protection (assumed to be virtual) value).

Embodiments disclosed herein provide subcarrier allocation (e.g., BPSK, QPSK, 16-QAM, 64-QAM, and 256-QAM) based on a set of modulation patterns used in prior systems. The code rate used in the previous system contains the following sets r = {1/2, 3/4, 2/3, and 5/6}. All of the code rates of this set are not necessarily used for all modulation patterns, but this includes all current code rates used throughout the modulation set. To determine the effective subcarrier allocation, the same modulation and coding assignments can be used as in previous systems (eg, IEEE 802.11a/.11n/.11ac).

In some embodiments, existing channel interleaver from previous IEEE 802.11 OFDM systems can be used. A channel interleaver, for example, may be used in a channel interleaver as defined in section 22.3.10.8 of IEEE Std. 802.11ac-2013, "IEEE Information Technology Standards - Communication and Information Exchange between Systems - Locality and Metropolitan Areas Network - Part 11: Wireless LAN Media Access Control (MAC) and Physical Layer (PHY) Specifications, Revision 4: Enhancements for very high throughput for operation in bands below 6 GHz", although embodiments The category is not limited to this argument. The interleaver parameters are listed in Listing 22-17, "Number of Columns and Rows in Interleaver" of the IEEE specification. Column The table is included here as Listing I, for the case of 1 to 4 spatial streams.

In IEEE 802.11n, 40 MHz was introduced by reusing a modified interleaver algorithm to the matrix size defined by writing and reading data. Then in IEEE 802.11ac, the same interleaver algorithm was adopted with the introduction of 80 MHz. These parameters define the number of coded symbols stored in the interleaver. Embodiments disclosed herein may also reuse existing interleaver algorithms with new values to define NCOL and NROW for OFDMA allocation. Because when more than one spatial stream is present, the NROT operation defines one of the values to rotate, and when NROT does not define the interleaver size, this item can be ignored and thus will not affect the subcarrier selection.

As seen in the above list, NROW is a constant multiplied by the number of coded bits per subcarrier of each stream. Therefore, the actual size of the interleaver is a function of the MCS. Some embodiments disclosed herein define a constant (y) used in calculating NROW. Embodiments disclosed herein define subcarrier allocations based on an exhaustive search within a range to achieve a fully reasonable subcarrier allocation under the target limits listed above. Some embodiments disclosed herein may not provide an exact definition of interleaver parameters, but A solution to the many interleaver configurations that use the above limitations can be provided. The embodiments disclosed herein provide for longer symbol delays for OFDMA 80 MHz and 40 MHz bandwidth units using one of the above set of subcarrier allocations and can be allowed up to 18 users in 80 MHz (or in 40 MHz) Multi-channel transmission up to 9 users).

As described above, in the 20 MHz IEEE 802.11ac, the fixed subcarrier spacing is 312.5 kHz and thus the total number of subcarriers is 64. Of these 64 subcarriers, 52 subcarriers are designated for data, 1 subcarrier is used for direct current (assumed to be a virtual value), 4 subcarriers are used for pilots, and the remaining 7 subcarriers are used for protection (assumed to be virtual) value). Depending on some embodiments for 4x symbol delay, the FFT size may be 256 for 20 MHz, 512 for 40 MHz, and 1024 for 80 MHz. Initially, an algorithm can be used to search anywhere from 208 to 244 subcarriers for each of the two users of the data subcarrier, which will then allow 52 to 12 virtual for 2 users. The value subcarriers are specified in the 40 MHz bandwidth, respectively. The algorithm can then search for any of the 416 to 504 subcarriers for each of the two users of the data subcarrier, which will then allow 96 to 8 virtual subcarriers for 2 users to be separately It is specified in the 80MHz bandwidth. To determine if a configuration is possible, a set of equations can be used. Finally, the algorithm can search anywhere from 896 to 1012 subcarriers for a user of the data subcarrier, which will then allow 128 to 12 virtual subcarriers to be individually assigned in the 80 MHz bandwidth. For the sake of clarity, a set of variables will be defined below: N Number of _SD data subcarriers

N _CBPS number of coded bits per symbol

Number of coded bits per N carrier of N _BPSCS

N _DBPS number of data bits per symbol

N _ROW interleaver column size equal to y * N _BPSCS

r code rate

M modulation order (1=BPSK, 2=QPSK, 4=16-QAM, 6=64-QAM, 8=256-QAM, and 10=1024-QAM)

With those definitions, the set of steps and equations used to determine whether a configuration is valid is listed below:

1. Select the number of data subcarriers to test ( N _SD )

2. Calculate N _CBPS = N _SD * M

3. Calculate N _BPSCS = N _CBPS * N _SD

4. Calculate N _ROW = y * N _BPSCS ; (where y is the specified interleaver parameter)

5. Calculate INT _DIM = N _ROW * N _COL

6. Calculation

7. Calculation

8. Calculation

9. Test if ((M ₁ =0) & (M ₁ =0)) is true, then it is valid, otherwise it is no.

Therefore, if M ₁ & M ₂ =0, then the configuration using this code rate and modulation is permissible, otherwise it is not allowed.

A short program can be combined to find possible combinations. On the first run, it is assumed that all modulations can be supported for 40MHz and 80MHz as in IEEE 802.11ac. This includes 64 and 256-QAM with code rates of 3/4 and 5/6 (incorporated in IEEE 802.11ac). For this assumption, allowing an allocation of 1024-point FFTs can include:

The search results show that there are many possibilities for data tones that will leave the number of extra subcarriers within 80 MHz. These additional tones can be used for pilot tones, imaginary values at DC, virtual subcarriers as guard bands, and even virtual subcarriers that will be stuffed between users. From the above list, a preferred option is listed in the list below.

Listing IIIa (below) lists some additional allocation sizes, including 256-QAM with a code rate of 5/6 and those other than those previously listed in Listing III.

A similar search for two users in 80 MHz (by a 1024-point FFT) or one of 40 MHz (by a 512-point FFT) can be performed to provide the following allowable assignments:

The search can be repeated, but does not require support with a code rate of 256QAM of 5/6 (i.e., the same mutual exclusion of 20 MHz used in IEEE 802.11ac). So in addition to those listed in Listing IV, the possible assignments for a 512-point FFT can include:

The search results show a number of possibilities for this number of data tones, which will leave extra subcarriers within 80 MHz and / or 40 MHz. These extra tones can be used for pilot tones, virtual values at DC, virtual subcarriers as guard bands, and even virtual subcarriers that will be stuffed between users. From the above list, a preferred option is listed below.

A search for two users in 40 MHz (by a 512-point FFT) or one of 20 MHz (by a 256-point FFT) can be repeated and the allowed allocations can include:

From the above list, a preferred choice is listed below.

For those users who need support with a code rate of 256QAM of 5/6 (one of the list IX/three rows) and two of the 20MHz (256-point FFT) that do not have the last three rows of the list IX, Repeated, the latter being the same mutual exclusion used in 20MHz in 802.11ac. So the choice for a 512-point FFT can include:

From the above list, a preferred selection is shown in the table below.

In the case of low density parity check (LDPC) coding, there may be no need for one of the interleaver block sizes, but the above allocations can be used because they are the allocation sizes that are used in accordance with BCC coding. These solutions provide a 1024-point FFT in 80 MHz for the IEEE 802.11ax OFDMA mode, a 512-point FFT in 40 MHz, and a 256-point FFT in 20 MHz.

FIG. 3 illustrates a HEW device in accordance with some embodiments. The HEW device 300 can be a HEW-compliant device that can be configured to communicate with one or more other HEW devices, such as an HEW station and/or a primary station, and to communicate with legacy devices. The HEW device 300 may be suitable for operation such as a primary station (HEW primary station 102 (FIG. 1)) or a HEW station 104 (FIG. 1). Moreover, in accordance with an embodiment, HEW device 300 can include a physical layer (PHY) circuit 302 and a media access control layer circuit (MAC) 304. PHY 302 And MAC 304 may be an HEW compliant layer and may also follow one or more conventional IEEE 802.11 standards. PHY 302 can be configured to transmit an HEW frame. HEW device 300 may also include other processing circuitry 306 and memory 308 that are configured to perform the various operations described herein.

In accordance with some embodiments, the MAC 304 can be configured to compete for a wireless medium during a contention period to receive control of media for the HEW control period and to assemble an HEW frame. PHY 302 can be configured to transmit the HEW frame as discussed above. The PHY 302 can also be configured to receive an HEW frame from one of the HEW stations. The MAC 304 can also be configured to perform transmission and reception operations through the PHY 302. The PHY 302 can include circuitry for modulation/demodulation, uplink and/or downlink conversion, filtering, amplification, and the like. In some embodiments, processing circuit 306 can include one or more processors. In some embodiments, two or more antennas can be coupled to the physical layer circuitry configured to transmit and receive signals including the transmission of the HEW frame. The memory 308 can store information used to assemble the processing circuitry 306 for operations to assemble and transmit HEW frames and perform various operations as described herein.

In some embodiments, HEW device 300 can be configured to communicate using OFDM communication signals via a multi-carrier communication channel. In some embodiments, the HEW device 300 can be configured to receive signals in accordance with a particular communication standard, such as the Institute of Electrical and Electronics Engineers (IEEE) standards, including IEEE 802.11-2012, IEEE 802.11n-2009, IEEE 802.11ac. -2013 and/or IEEE 802.11ax standards and/or recommended specifications for WLANs including the proposed HEW standard, although the scope of the invention is not They are limited to this argument because they can also properly transmit and/or receive communications in accordance with other technologies and standards. In some other embodiments, the HEW device 300 can be configured to receive signals using one or more other modulation techniques, such as spread spectrum modulation (eg, direct sequence code multiple access (DS-) CDMA) and/or frequency hopping code multiple access (FH-CDMA), time division multiplexing (TDM) modulation, and/or frequency division multiplexing (FDM) modulation, although the scope of the embodiment It is not limited to this argument.

In some embodiments, the HEW device 300 can be a component of a portable wireless communication device, such as a PDA, a laptop or portable computer with wireless communication capabilities, a network tablet, a wireless telephone or smart phone, a wireless headset, a portable pager, an instant messaging device, a digital camera, an access point, a television, a medical device (eg, a heart rate monitor, a blood pressure monitor) , or the like, or other device that can receive and/or transmit information wirelessly. In some embodiments, the HEW device 300 can include one or more of the following components, such as a keyboard, a display, a non-electric memory, a plurality of antennas, a graphics processor, an application processor, a microphone, And other mobile device components. The display can be an LCD screen containing one of the touch screens.

The antenna 301 of the HEW device 300 may include one or more directional or omnidirectional antennas, for example, including dipole antennas, monopole antennas, patch antennas, loop antennas, microstrip antennas, or for transmission of RF signals. Other types of antennas. In some multiple input multiple output (MIMO) embodiments, The antenna 301 can be effectively separated to take advantage of the spatial variability and different channel characteristics that can be produced between the antennas and the antennas of a transmitting station.

Although the HEW device 300 is illustrative of elements having many individual functions, one or more of the functional elements can be combined and can be configured by a software (eg, a processing element including a digital signal processor (DSP)), and/or It is implemented by a combination of other hardware components. For example, some components may include one or more microprocessors, DSPs, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), radio frequency integrated circuits (RFICs), and used to perform at least the methods described herein. A combination of various hardware and logic circuits that function. In some embodiments, the functional elements of HEW device 300 may be one or more processing procedures involved in operating on one or more processing elements.

Embodiments may be practiced in one or a combination of hardware, firmware, and software. Embodiments may also be implemented as instructions stored on a computer readable storage device, which may be read and executed by at least one processor for performing the operations described herein. A computer readable storage device can include any non-transitory mechanism for storing information in one form that can be read by a machine (eg, a computer). For example, a computer readable storage device can include read only memory (ROM), random access memory (RAM), magnetic disk storage media, optical storage media, flash memory devices, and other storage devices and media. . Some embodiments may include one or more processors and may be assembled by instructions stored on a computer readable storage device.

4 is a step of transmitting a longer delay OFDM symbol using a resource allocation unit in accordance with some embodiments. Step 400 can be performed by a HEW device, such as HEW station 104 (FIG. 1) or a HEW master station 102 (FIG. 1).

Operation 402 includes assembling a block interleaver to interleave blocks of encoded input data in accordance with one of a plurality of interleaver configurations determined for a subcarrier allocation of one of the longer delay OFDM symbols.

Operation 404 includes processing the longer delay OFDM symbols by a 512 point fast Fourier transform for communication over a 40 MHz channel bandwidth comprising a 40 MHz resource allocation unit.

Operation 406 includes processing the longer delay OFDM symbols by a 1024-point fast Fourier transform for communication over an 80 MHz channel bandwidth comprising either of the two 40 MHz resource allocation units or an 80 MHz resource allocation unit. The HEW device can be configured to perform either operation 404 or operation 406 depending on the size of the resource allocation unit.

Operation 408 includes transmitting a longer delay OFDM symbol (in the form of a time domain OFDMA waveform) on a channel resource comprising one or more resource allocation units in accordance with a non-contention based communication technique. In some embodiments, the longer delay OFDM symbols may be delivered in accordance with MU-MIMO techniques during a control period (eg, a TXOP).

In an example, a high performance (HE) communication station (STA) includes a physical layer and a media access control layer circuit for: according to an orthogonal frequency division multiplexing access (OFDMA) technology on channel resources. Passing a longer delay orthogonal An OFDM symbol, the channel resource including one or more resource allocation units, each resource allocation unit including a predetermined number of data subcarriers; and a resource allocation unit configured for use according to one of a plurality of subcarrier allocations Long delay OFDM symbol communication; processing longer delay OFDM symbols by at least one of: a 512 point FFT for communication via a 40 MHz channel bandwidth including a 40 MHz resource allocation unit; and a 1024 point Fast Fourier Transform (FFT) for communication over an 80 MHz channel bandwidth including either of two 40 MHz resource allocation units or one 80 MHz resource allocation unit.

In another example, for binary convolutional code (BCC) encoding, the resource allocation unit is further configured for use with longer delay OFDM symbols depending on one of a plurality of interleaver configurations for subcarrier allocation. For communication, the longer delay OFDM symbol has a symbol delay that is four times (4x) longer than a standard OFDM symbol delay, and when operating as a primary station 102, the communication station is configured to perform : processing a longer delay OFDM symbol for a single user station using a 512 point FFT for communication within a 40 MHz resource allocation unit; processing a longer delay OFDM symbol for a single user station using a 1024 point FFT to For communication within an 80 MHz resource allocation unit; and processing the longer delay OFDM symbols for two user stations using a 512 point FFT for communication within an 80 MHz resource allocation unit.

In another example, a longer delay OFDM symbol is processed for a 1024-point FFT that does not have a 5/6 code rate mutual exclusion for 256 Quadrature Amplitude Modulation (QAM) for binary whirling code encoding. 80MHz resource allocation The predetermined number of data subcarriers of the unit is one of: for a 936 data subcarrier having an interleaver configuration of 26 rows, for a 960 data subcarrier having an interleaver configuration of 15 or 20 rows, For 984 data subcarriers with one of the 24 or 41 line interleaver configurations, and for 990 data subcarriers with one of the 22, 30 or 33 line interleaver configurations, and for low density parity check (LDPC) The predetermined number of data subcarriers of the encoded 80 MHz resource allocation unit are one of 936 data subcarriers, 960 data subcarriers, 984 data subcarriers, and 990 data subcarriers.

In another example, longer delayed OFDM symbols are processed for binary by 512-point fast Fourier transform (FFT) without 5/6 code rate mutual exclusion for 256 Quadrature Amplitude Modulation (QAM) The predetermined number of data subcarriers of the 40 MHz resource allocation unit of the whirling code is one of: for 468 data subcarriers having one of the 26 rows of interleaver configurations, and for one of the 18 or 27 rows of interleaver Configured 486 data subcarriers. Processing a longer delay OFDM symbol by a 512-point fast Fourier transform (FFT) with a 5/6 code rate mutual exclusion for 256-QAM, a predetermined number of 40 MHz resource allocation units for binary whirling code encoding The data subcarrier is for 490 data subcarriers with one of the 14 or 35 row interleaver configurations, and the predetermined number of data subcarriers for the low density parity check coded 40 MHz resource allocation unit are 468, 486, and 490 data. One of the subcarriers.

In another example, the station is further configurable to: process a longer delay received from one or two user stations in a 40 MHz resource allocation unit using 512-point fast Fourier transform OFDM symbols; and processing of longer delay OFDM symbols received from a user station in a 20 MHz resource allocation unit using 256-point fast Fourier transform.

In another example, for processing longer-latency OFDM symbols by 256-point fast Fourier transform (FFT) without a code rate mutual exclusion, a predetermined number of 20 MHz resource allocation units for binary convolutional code (BCC) coding The data subcarrier is one of the following: 234 data subcarriers for one of the 26 rows of interleaver configurations, 228 data subcarriers with one of the 19 rows of interleaver configurations, and for 20 rows One of the interleaver configured 240 data subcarriers, and the predetermined number of data subcarriers for the low density parity check (LDPC) encoded 20 MHz resource allocation unit is one of the 234, 228, and 240 data subcarriers.

In another example, the station is further configured to: process a longer delayed OFDM symbol received from a second user station within a 20 MHz resource allocation unit using a 256-point fast Fourier transform, and for not having The 5/6 code rate of 256 Quadrature Amplitude Modulation (QAM) is mutually exclusive and handles the longer delay OFDM symbols from the two user stations for a predetermined number of 20 MHz resource allocation units for binary convolutional code (BCC) coding. The data subcarrier is one of the following: 102 data subcarriers for an interleaver configuration with 6 or 17 rows, and 108 data subcarriers for an interleaver configuration with 18 rows. For a longer delay OFDM symbol from a two-user station with a code rate mutual exclusion of 5/6 for 256-QAM, a predetermined number of pieces of information for a 20 MHz resource allocation unit of binary convolutional code (BCC) coding The carrier is used for an interleaver configuration with 13 rows The data subcarriers and the predetermined number of data subcarriers for the 20 MHz resource allocation unit of the low density parity check code are one of the 102, 108, and 104 data subcarriers.

In another example, the physical layer circuit includes a block interleaver having a depth of an orthogonal frequency division multiplex symbol, the block interleaver being configurable to interleave a block when binary convolutional code encoding is used Coding data and avoiding interleaving when low density parity check is used, and the interleaver configuration includes a number of rows and a number of columns, the number of columns being based on each subcarrier of each stream The number of encoded bits.

In another example, the communication station further includes: an encoder for encoding the input data prior to interleaving according to one of the plurality of code rates; and a distribution mapper for interleaving at a positive The encoded data is mapped after the amplitude modulation (QAM) distribution. The encoder and the mapper operate in accordance with one of a plurality of predetermined modulation and coding scheme (MCS) combinations for the subcarrier allocation, and the plurality of predetermined modulation sums for the subcarrier allocation A coding scheme (MCS) combination is a coding bit (Ncbps) limited to one integer per OFDM symbol and an integer number of data bits (Ndbps) per OFDM symbol.

In another example, longer delay OFDM symbols are selected for use in a larger delay spread environment, and standard delayed OFDM symbols are selected for use in either legacy communication or smaller delay extended environments.

In another example, the standard delayed OFDM symbol has a symbol delay ranging from 3.6 microseconds (μs) including a short period of 400 nanoseconds (ns) to a guard interval of 800 nanoseconds. Microseconds.

In another example, the communication station further includes one or more processors and memory, and the physical layer circuitry includes a transceiver. In another example, the communication station further includes one or more antennas coupled to the transceiver.

In another example, a method for high performance (HE) wireless communication, the method comprising the steps of: transmitting a longer delay orthogonal to a channel resource according to an orthogonal frequency division multiplexing access (OFDMA) technique Frequency division multiplexing (OFDM) symbols, the channel resources including one or more resource allocation units, each resource allocation unit including a predetermined number of data subcarriers; allocating the resource allocations according to one of a plurality of subcarrier allocations Units for communication of the longer delay orthogonal frequency division multiplexing (OFDM) symbols; and processing the longer delay orthogonal frequency division multiplexing (OFDM) symbols by at least one of: 512 Point Fast Fourier Transform (FFT) for communication over a 40 MHz channel bandwidth including a 40 MHz resource allocation unit; and a 1024-point Fast Fourier Transform (FFT) for including two 40 MHz resource allocation units or Communication over an 80MHz channel bandwidth of any of the 80MHz resource allocation units.

In another example, for binary convolutional code (BCC) encoding, the resource allocation unit is further configured for communication for longer delay OFDM symbols in accordance with one of a plurality of interleaver configurations for subcarrier allocation, The longer delay orthogonal frequency division multiplex symbol has a symbol delay which is four times (4x) longer than the delay of a standard orthogonal frequency division multiplex symbol. In this example, the method further includes the steps of: processing a longer delay for a single user station using a 512-point fast Fourier transform (FFT) OFDM symbols for communication within a 40 MHz resource allocation unit; processing of longer delay OFDM symbols for a single user station using 1024-point Fast Fourier Transform (FFT) for use within an 80 MHz resource allocation unit Communication; and processing of longer delay OFDM symbols for two user stations using 512-point Fast Fourier Transform (FFT) for communication within an 80 MHz resource allocation unit.

In another example, the method further includes the steps of: processing the longer delay OFDM symbols received from one or two user stations in a 40 MHz resource allocation unit using 512-point fast Fourier transform; and using 256 points fast The Fourier transform processes the longer delay OFDM symbols received from a user station in a 20 MHz resource allocation unit.

In another example, the method further includes transmitting a longer delayed OFDM symbol comprising one or more resource allocation units in accordance with a non-contention based communication technique during a control period.

In another example, a non-transitory computer storing instructions can read memory media for execution by one or more processors to operate to assemble a high performance (HE) communication station (STA) for: transmitting a longer delay orthogonal frequency division multiplexing (OFDM) symbol on a channel resource according to an orthogonal frequency division multiplexing access (OFDMA) technique, the channel resources including one or more resources An allocation unit, each resource allocation unit includes a predetermined number of data subcarriers; and the resource allocation units are configured for communication of the longer delay OFDM symbols according to one of the plurality of subcarrier allocations; and by the following Processing at least one of these longer delay orthogonalities Divided multiplex symbol: a 512-point Fast Fourier Transform (FFT) for communication over a 40 MHz channel bandwidth including a 40 MHz resource allocation unit; and a 1024-point Fast Fourier Transform (FFT) for Communication over an 80 MHz channel bandwidth including either of the 40 MHz resource allocation units or an 80 MHz resource allocation unit.

In another example, for binary convolutional code (BCC) encoding, the resource allocation unit is further configured in accordance with one of a plurality of interleaver configurations for subcarrier allocation for use in longer delay OFDM symbols. Communication, the longer delay OFDM symbols have a symbol delay that is four times (4x) longer than a standard orthogonal frequency division multiplex symbol delay, and the operations are grouped with HEW communication stations to: use 512 Point Fast Fourier Transform (FFT) processes the longer delay OFDM symbols for a single user station for communication within a 40 MHz resource allocation unit; uses 1024 point Fast Fourier Transform (FFT) for a single user The station processes the longer delay OFDM symbols for communication within an 80 MHz resource allocation unit; and processes the longer delay OFDM symbols for two user stations using 512-point Fast Fourier Transform (FFT), Used for communication within an 80 MHz resource allocation unit.

In another example, the longer delay OFDM symbol has a symbol delay that is four times (4x) longer than a standard OFDM symbol delay, and the operation further groups the HEW communication station to be in a control cycle. During this time, longer delay OFDM symbols including one or more resource allocation units are delivered in accordance with a non-contention based communication technique.

The Abstract is provided to comply with 37 C.F.R. Clause 1.72(b), and an abstract will allow the reader to ascertain the nature and substance of the technical disclosure. should It is understood that the submission will not be used to limit or explain the scope or meaning of the scope of the patent application. The scope of the following patent application is hereby incorporated by reference in its entirety in its entirety herein in its entirety in its entirety in its entirety in its entirety

Claims (17)

A high-performance (HE) communication station (STA) device, comprising: a memory; and a physical layer coupled to the memory and a media access control layer circuit, wherein the physical layer and the media access control layer circuit are used Transmitting a longer delay orthogonal frequency division multiplexing (OFDM) symbol on a channel resource according to an orthogonal frequency division multiplexing access (OFDMA) technique, the channel resources including one or more resource allocation units, and each resource The allocation unit includes a predetermined number of data subcarriers; the resource allocation units are configured for communication of the longer delay orthogonal frequency division multiplex symbols according to one of the plurality of subcarrier allocations; and by the following Processing the longer delay orthogonal frequency division multiplex symbols at least one of: a 512 point fast Fourier transform (FFT) for communication over a 40 MHz channel bandwidth comprising a 40 MHz resource allocation unit; A 1024-point fast Fourier transform for communication over an 80 MHz channel bandwidth comprising either of a 40 MHz resource allocation unit or an 80 MHz resource allocation unit, wherein for binary convolutional code (BCC) encoding, Equal capital The source allocation unit is further configured to communicate with the longer delay orthogonal frequency division multiplex symbols according to one of a plurality of interleaver configurations for the subcarrier allocation, wherein the longer delays Orthogonal frequency division multiplexing symbol has a symbol delay, the symbol The delay is four times (4×) long of a standard orthogonal frequency division multiplex symbol delay, and wherein when the communication station operates as a master station, the communication station can be combined to: use the 512 points Fast Fourier Transform processes the longer delay orthogonal frequency division multiplex symbols for a single user station for communication within a 40 MHz resource allocation unit; using the 1024 point fast Fourier transform for a single user station Processing the longer delay orthogonal frequency division multiplex symbols for communication within an 80 MHz resource allocation unit; and processing the longer delay orthogonality for two user stations using the 512 point fast Fourier transform The frequency division multiplex symbol is used for communication within an 80 MHz resource allocation unit. The apparatus of claim 1, wherein the longer delay orthogonality is processed for the 1024-point fast Fourier transform without a code rate mutual exclusion of 5/6 for 256 Quadrature Amplitude Modulation (QAM) a frequency division multiplex symbol, the predetermined number of data subcarriers of the 80 MHz resource allocation unit for binary whirling code encoding, one of: one for 936 data subcarriers having an interleaver configuration of 26 rows, 960 data subcarrier for an interleaver configuration with 15 or 20 rows for 984 data subcarriers with one or 24 line interleaver configurations, and for one of 22, 30 or 33 rows 990 data subcarriers configured by the interleaver, and The predetermined number of data subcarriers 936 for the low density parity check (LDPC) encoding of the 80 MHz resource allocation unit is one of a data subcarrier, a 960 data subcarrier, a 984 data subcarrier, and a 990 data subcarrier. The apparatus of claim 1, wherein the longer delay orthogonal frequency division is processed for the 512-point fast Fourier transform without a code rate mutual exclusion of 5/6 for 256 orthogonal amplitude modulation The work symbol, the predetermined number of data subcarriers of the 40 MHz resource allocation unit for binary whirling code encoding is one of: for 468 data subcarriers having an interleaver configuration of 26 rows, and for 486 data subcarrier having an interleaver configuration of 18 or 27 rows, wherein the 512 point fast Fourier transform is performed by a 512 point fast Fourier transform with a code rate mutual exclusion of 5/6 for 256 quadrature amplitude modulation The longer delay orthogonal frequency division multiplexing symbol, the predetermined number of data subcarriers of the 40 MHz resource allocation unit for binary whirling code encoding is used for 490 data sub-array configuration with one or 14 rows of interleaver configurations Carrier, and one of the predetermined number of data subcarrier systems 468, 486, and 490 data subcarriers for the 40 MHz resource allocation unit of the low density parity check code. The device of claim 1, wherein the primary station is further configurable to: process the one or two using the 512-point fast Fourier transform The longer delay orthogonal frequency division multiplexing symbols received by the user station in a 40 MHz resource allocation unit; and processing received from a user station in a 20 MHz resource allocation unit using the 256-point fast Fourier transform The longer delay orthogonal frequency division multiplex symbols. The apparatus of claim 4, wherein the longer delay orthogonal frequency division multiplex symbol is processed by the 256-point fast Fourier transform without a code rate mutual exclusion, the 20 MHz resource for binary whirling code encoding The predetermined number of data subcarriers of the allocation unit is one of: 234 data subcarriers for one of the 26 rows of interleaver configurations, 228 data subcarriers for one of the 19 rows of interleaver configurations And the 240 data subcarriers having an interleaver configuration of 20 rows, and the predetermined number of data subcarrier systems 234, 228, and 240 data subcarriers for the 20 MHz resource allocation unit of low density parity check coding One of them. The device of claim 4, wherein the primary station is further configurable to: process the longer delay orthogonal received from a second user station in a 20 MHz resource allocation unit using the 256-point fast Fourier transform a frequency division multiplex symbol, and wherein the longer delay orthogonal frequency division multiplex symbols from the two user stations are processed for a code rate exclusive exclusion of 5/6 for 256 quadrature amplitude modulation, 20MHz for binary whirling code encoding The predetermined number of data subcarriers of the resource allocation unit are one of: 102 data subcarriers having an interleaver configuration of 6 or 17 rows, and for an interleaver configuration having 18 rows. 108 data subcarriers, wherein the longer delay orthogonal frequency division multiplex symbols from the two user stations are processed for a code rate mutual exclusion of 5/6 for 256 quadrature amplitude modulation for binary The predetermined number of data subcarriers of the 20 MHz resource allocation unit of the convolutional code are used for 104 data subcarriers having an interleaver configuration of 13 rows, and for the 20 MHz resource allocation unit of low density parity check coding One of the predetermined number of data subcarrier systems 102, 108, and 104 data subcarriers. The device of claim 1, wherein the physical layer circuit comprises a block interleaver having a depth of an orthogonal frequency division multiplex symbol, the block interleaver being configurable to interleave when the binary convolutional code is used Encoded data for a block and avoids interleaving when Low Density Parity Check (LDPC) is used, and wherein the interleaver configuration includes a number of rows and a number of columns, the number of which is based on each string A number of coded bits per subcarrier of the stream. The device of claim 7, wherein the communication station further comprises: an encoder for encoding the input data prior to interleaving according to one of a plurality of code rates; a distribution mapper for mapping the encoded data after interleaving to a quadrature amplitude modulation profile, wherein the encoder and the mapper are in accordance with a plurality of predetermined modulation and coding schemes for the subcarrier allocation The (MCS) combination operates, wherein the plurality of predetermined modulation and coding scheme combinations for the subcarrier allocation are coded bits that are limited to an integer of one of each orthogonal frequency division multiplex symbol ( Ncbps) and an integer number of data bits (Ndbps) for each of the orthogonal frequency division multiplex symbols. The device of claim 1, wherein the longer delay orthogonal frequency division multiplexing symbols are selected for a larger delay spread environment, and wherein the standard delay orthogonal frequency division multiplexing symbol is used for legacy communication Or any of the smaller delay extended environments are selected. The device of claim 1, wherein the standard delay orthogonal frequency division multiplexing symbols have a symbol delay ranging from 3.6 microseconds (μs) to a short guard interval of 400 nanoseconds (ns) to Includes a 4 microsecond guard interval of 800 nanoseconds. The device of claim 1, further comprising one or more processors and memory, and wherein the physical layer circuitry comprises a transceiver. The device of claim 10, further comprising one or more antennas coupled to the transceiver. A method performed by a high performance (HE) wireless communication device, comprising: Transmitting a longer delay orthogonal frequency division multiplexing (OFDM) symbol on a channel resource according to an orthogonal frequency division multiplexing access (OFDMA) technique, the channel resources including one or more resource allocation units, and resource allocation The unit includes a predetermined number of data subcarriers; the resource allocation units are configured for communication of the longer delay orthogonal frequency division multiplex symbols according to one of the plurality of subcarrier allocations; and at least Processing the longer delay orthogonal frequency division multiplex symbols: a 512 point fast Fourier transform (FFT) for communication over a 40 MHz channel bandwidth comprising a 40 MHz resource allocation unit; 1024-point fast Fourier transform for communication over an 80 MHz channel bandwidth comprising either of a 40 MHz resource allocation unit or an 80 MHz resource allocation unit, wherein for binary convolutional code (BCC) encoding, such The resource allocation unit is further configured to communicate with the longer delay orthogonal frequency division multiplex symbols according to one of a plurality of interleaver configurations for the subcarrier allocation, wherein the longer delays The orthogonal frequency division multiplexing symbol has a symbol delay, which is four times (4×) long of a standard orthogonal frequency division multiplexing symbol delay, and wherein the method further comprises: using the 512 point fast Fourier transform Processing the longer delay orthogonal frequency division multiplex symbols for a single user station for communication within a 40 MHz resource allocation unit; Processing the longer delay orthogonal frequency division multiplex symbols for a single user station using the 1024 point fast Fourier transform for communication within an 80 MHz resource allocation unit; and using the 512 point fast Fourier transform for The two user stations process the longer delay orthogonal frequency division multiplex symbols for communication within an 80 MHz resource allocation unit. The method of claim 13, further comprising: processing the longer delay orthogonal frequency division multiplexing received in a 40 MHz resource allocation unit from one or two user stations using the 512 point fast Fourier transform a symbol; and processing the longer delay orthogonal frequency division multiplex symbols received from a user station in a 20 MHz resource allocation unit using the 256-point fast Fourier transform. The method of claim 13, further comprising transmitting the longer delay orthogonal frequency division multiplex symbols comprising one or more resource allocation units during a control period in accordance with a non-contention based communication technique. A non-transitory computer readable storage medium storing instructions for use by one or more processors to operate to assemble a high performance (HE) communication station (STA) device to: Transmitting a longer delay orthogonal frequency division multiplexing (OFDM) symbol on a channel resource according to an orthogonal frequency division multiplexing access (OFDMA) technique, the channel resources including one or more resource allocation units, and resource allocation The unit includes a predetermined number of data subcarriers; the resource points are grouped according to one of the plurality of subcarrier allocations Arranging units for the transmission of the longer delay orthogonal frequency division multiplex symbols; and processing the longer delay orthogonal frequency division multiplex symbols by at least one of: a 512 point fast Fourier transform ( FFT) for communication over a 40 MHz channel bandwidth comprising a 40 MHz resource allocation unit; and a 1024-point fast Fourier transform for containing two 40 MHz resource allocation units or an 80 MHz resource allocation unit Communication over any of the 80 MHz channel bandwidths, wherein for binary convolutional code (BCC) encoding, the resource allocation units are further dependent on one of a plurality of interleaver configurations for the subcarrier allocations Generating a communication for the longer delay orthogonal frequency division multiplexing symbols, wherein the longer delay orthogonal frequency division multiplexing symbols have a symbol delay, and the symbol delay is a standard orthogonal frequency division The symbol delay is four times (4×) long, and wherein the operations are grouped with the HEW communication station to: use the 512-point fast Fourier transform to process the longer delay orthogonal frequency division multiplexing for a single user station Symbol to Communication within a 40 MHz resource allocation unit; processing the longer delay orthogonal frequency division multiplex symbols for a single user station using the 1024-point fast Fourier transform for use within an 80 MHz resource allocation unit Communication; and processing the longer delay orthogonal frequency division multiplex symbols for the two user stations using the 512-point fast Fourier transform for Communication within an 80MHz resource allocation unit. The non-transitory computer readable storage medium of claim 16, wherein the longer delay orthogonal frequency division multiplexing symbols have a symbol delay, and the symbol delay is a standard orthogonal frequency division multiplexing symbol delay four Multiple (4x) long, and wherein the operations further assemble the HEW communication station to deliver the longer delays comprising one or more resource allocation units in accordance with a non-contention based communication technique during a control cycle Time orthogonal frequency division multiplex symbol.