Abstract: Various proposed schemes pertaining to interleaving of combinations of multiple resource units (RUs) in wireless local area networks (WLANs) are described. In one example, data in a service data unit (SDU) is processed. The process data is then transmitted to a receiving entity over at least some of a plurality of resource units (RUs). The processing of the data involves either: (i) performing tone mapping by using one joint tone interleaver on one or more combinations of multiple RUs of the plurality of RUs within one frequency segment of a predefined bandwidth; or (ii) performing tone mapping by using multiple tone interleavers on the one or more combinations of multiple RUs of the plurality of RUs over multiple frequency segments of the predefined bandwidth.

Abstract: A method of extremely high coding rates for next-generation wireless local area network (WLAN) systems involves coding an input data at a first coding rate using codes designed for coding up to a second coding rate lower than the first coding rate to provide a coded data. The method also involves wirelessly transmitting the coded data.

Abstract: Systems and methods of transmitting a PPDU to or from a single user station (STA) in an OFDMA transmission by using multiple RUs. An access point (AP) allocates multiple RUs to an STA for an OFDMA transmission and correspondingly specifies the STA ID repeatedly in the user specific field of a SIG-B field in a downlink PPDU, or in the user information fields of a trigger frame. Alternatively, multiple AIDs of the STA can be specified in the user specific field or the user information fields instead of repeating the same STA ID. An indication may be inserted in the SIG-A field to indicate that the enhanced RU allocation scheme is used for the OFDMA transmission.

Abstract: A wireless communicating method includes: performing one resource unit allocation upon a channel; and allocating a first resource unit and a second resource unit in said one resource unit allocation to a station, wherein the first resource unit is different from the second resource unit. By using the wireless communication method, throughput rate can be improved.

Abstract: Systems and methods of expanding indication capabilities of existent PPDU preamble fields. The “GI+LTF Size” field is redefined to indicate a new combination of GI duration and HE-LTF size. The redefinition is indicated when the values of the two other existent fields, in combination, indicate an invalid scenario because the two values should have been mutually exclusive. Particularly, the DCM field and the STBC field are both set to the “enabled” mode as an indication for redefine the “GI+LTF Size” field. Upon receiving such a PPDU, a receiver is configured to resolve the PPDU as neither DCM nor STBC is enabled. Rather, the receiver interprets the particular combination of DCM and STBC values as an indication that the “GI+LTF Size” field is redefined to indicate the new combination of GI duration and HE-LTF size.

Abstract: A method of joint encoding schemes with interleaver and tone mapper for multiple-resource unit (multi-RU) operation involves performing joint encoding of a plurality of information bits to generate a plurality of encoded bit sequences. The method also involves processing the plurality of encoded bit sequences by interleaving and tone mapping the encoded bit sequences with respect to a plurality of resource units (RUs) on either or both of an aggregate-RU basis and an individual-RU basis to generate a plurality of processed bit sequences. The method further involves transmitting the plurality of processed bit sequences over the plurality of RUs.

Abstract: Embodiments of the present invention provide transmission schemes and methods that can assign multiple resource units (RUs) to a single wireless station using Aggregate Media Access Control Protocol Data Unit (A-MPDUs) in a flexible transmission scheme for the multi-RUs transmission. Embodiments of the present invention can send and receive data sing multiple resource units allocated to a single wireless STA. A 20 MHz segment and a 40 MHz segment on either side of a punctured portion of an 80 MHz segment can be treated as separate resource units (RUs), and the RUs can be assigned to the same wireless user/device. Each punctured 80 MHz segment can be interleaved separately. Different processes for encoding data and transmission schemes for transmitting the data are described herein according to embodiments of the present invention. Different transmission schemes can be used based on the size and number of the RUs allocated to an STA.

Abstract: Embodiments of the present invention can assign multiple resource units (RUs) to a single wireless station using an aggregated Multi-RU (“virtual resource unit” or “vRU”) that aggregates multiple RUs, and the parameters of the virtual RU can be calculated according to existing standards such the padding schemes and RUs (e.g., RU26, RU52, RU106, RU242, RU484, RU996, RU2x996) defined in IEEE 802.11ax. The virtual RU parameters used for joint encoding can be directly calculated based on formulas described herein according to embodiments of the present invention, and according to values obtained from pre-defined tables.

Abstract: Embodiments of the present invention provide an apparatus and method for WLAN transmission over 320 MHz channels that use encoding and modulation schemes of existing 160 MHz tone plans defined in the IEEE 802.11ax standard. For example, 320 MHz transmissions on a contiguous 320 MHz channel or a non-contiguous 160 MHz+160 MHz channel can be performed using a 320 MHz PPDU, or a 160 MHz+160 MHz PPDU, and the 320 MHz/160 MHz+160 MHz PPDU can be defined using the 160 MHz tone plan according to the IEEE 802.11ax standard. The existing tone plan of the IEEE 802.11ax standard is modified as described herein according to embodiments of the present invention. According to some embodiment, the 160 MHz tone plan can be repurposed to support multi-link aggregation including 80 MHz+240 MHz transmission, or 160 MHz+160 MHz transmission using two or more links.

Abstract: A method and an apparatus for data processing are provided. In the method and apparatus, compressed image data including N pieces of compressed image slice data each composed of invalid and valid data is received; when storing the N pieces of compressed image slice data into a memory, writing of a piece of compressed image slice data corresponding to the invalid data is stopped on detecting that a preset amount of invalid data has been continuously stored in the memory; and the piece of compressed image slice data in the memory is read, and an image slice is obtained by decoding valid data in the piece of compressed image slice data.

Abstract: Embodiments of the present invention provide a method and apparatus for tone interleaving wide channel bandwidths or transmissions using multiple-bands. Embodiments of the present invention are designed to accommodate new generations of WLAN. According to some embodiments, existing communication standards of the current generations of WLAN are used to simplify the implementation of the tone mapping schemes described herein. For example, some embodiments of the present invention use an 80 MHz channel bandwidth with resource units having 996 tones as a building block to efficiently implement new tone mapping and interleaving schemes for wider bandwidth channels.

Abstract: Methods and apparatus are provided for structured resource allocation signaling. In one novel aspect, an 8-bit RU allocation filed is allocated in the HE-SIG-B common field for each 20 MHz. The structured resource signaling supports more than four MU-MIMO users. In one embodiment, the STA decodes the 8-bit RU allocation signal following a structured resource unit (RU) allocation rule, and determines the RU. In one embodiment, the STA decodes the first two bits of the 8-bit RU allocation signal to determine a first category of the RU allocation. The categories of the RU allocation includes a large RU size category indicating larger than or equal to 20 MHz RUs exist, a two 106-tone category indicating two 106-tone RUs exist, and a no-large-RU category indicating only smaller-than-242-tone RUs exist. The STA further decodes based on the category. A lookup table (LUT) for RU allocation is built and decoded based on a structured signaling rule.

Abstract: A joint sounding mechanism used in a multi-AP system to gain channel information for joint data transmission. Multiple sounding APs can transmit a joint sounding packet that includes training symbols for the antennas of all the sounding APs with regard to the transmission channel. The antennas of the multiple sounding APs may be treated as a virtual antenna array with global antenna indexes. The joint sounding packet may include a plurality of training fields, each field corresponding to a respective antenna in the virtual antenna array. Alternatively, the joint sounding packet has subcarrier-interleaved training fields, where each sounding AP transmits training symbols on an allocated set of non-pilot subcarriers. Channel status information (CSI) can be generated by the STAs in response to the joint sounding packet and supplied to the APs. Accordingly, the APs can perform antenna beamforming and transmit a data packet jointly on the transmission channel.

Abstract: System and method of OFDMA transmission in which mid-ambles are configured on a per-user basis for channel variation adaptation. The multiple channels used in an OFDMA transmission may use different mid-amble settings based on their respective channel characteristics. Particularly, some channels may have mid-ambles and some may have not, and mid-amble update intervals may vary across the channels. For a trigger-based (TB) uplink (UL) OFDMA transmission, an AP may signal the per-user mid-amble information in the user information fields of the trigger frame. For a downlink (DL) OFDMA transmission, an AP may signal the per-user mid-amble information in the HE SIG-B fields.

Abstract: Systems and methods of transmitting a PPDU to or from a single user station (STA) in an MIMO transmission by using unequal MCSs. An access point (AP) allocates a plurality of spatial streams to the STA and assigned them into groups for the MIMO transmission. Multiple unequal MCSs are assigned to the different spatial stream groups. Correspondingly the STA ID is repeatedly specified in the user block fields of a SIG-B field of a downlink PPDU, or in the user information fields of a trigger frame. Alternatively, multiple AIDs of the STA can be specified in the user block fields or the user information fields instead of repeating the same STA ID. An indication may be inserted in the SIG-A field to indicate that the grouped-based unequal MCSs scheme is used for the MIMO transmission.

Abstract: Systems and methods of transmitting a PPDU to or from a single user station (STA) in an OFDMA transmission by using multiple RUs. An access point (AP) allocates multiple RUs to an STA for an OFDMA transmission and correspondingly specifies the STA ID repeatedly in the user specific field of a SIG-B field in a downlink PPDU, or in the user information fields of a trigger frame. Alternatively, multiple AIDs of the STA can be specified in the user specific field or the user information fields instead of repeating the same STA ID. An indication may be inserted in the SIG-A field to indicate that the enhanced RU allocation scheme is used for the OFDMA transmission.

Abstract: Presented systems and methods facilitate efficient and effective communication interference mitigation. In one embodiment, a method comprises: configuring a payload portion of information in a normal transmission sub-channel; puncturing information in a punctured sub-channel; adjusting a mitigation sub-channel use to mitigate interference associated with the punctured sub-channel; and transmitting the information in the normal transmission sub-channel, the punctured sub-channel, and the mitigation sub-channel.

Abstract: Methods and apparatus are provided for HE-SIG-B common field formats and indications. In one novel aspect, a fixed format is used for HE-SIG-B common field indicating resource allocations (RA). In one embodiment, look-up tables (LUT) are configured for the resource allocation and indicated in the HE-SIG-B common field. In one embodiment, one or more RA LUTs are used based on the operation bandwidth. The RA LUTs are placed in an order of channel indexes from lower channel to upper channel signaled in each corresponding RA LUT. In another novel aspect, MU-MIMO is used for operation bandwidth of 160 MHz and a compression indicator is set in the HE-SIG-A field indicating a saving of all RA LUTS in the HE-SIG-B common field. In yet another novel aspect, a one-bit middle-tone indicator is included in the HE-SIG-B common field indicating whether the one or more middle 26 tone is used.

Abstract: A new lower density parity check (LDPC) tone mapper is proposed when DCM is applied for a given resource unit (RU) when LDPC is used as the channel control coding. For HE PPDU transmission with DCM, LDPC encoded streams are first modulated by a DCM constellation mapper. The modulated symbols of the lower half of the frequency segment and the modulated symbols of the upper half of the frequency segment are modulated using the same LDPC encoded bits using DCM mapping. The modulated symbols of the lower half of the frequency segment are mapped to lower half of the data subcarriers using DCM LDPC tone mapper. The modulated symbols of the upper half of the frequency segment are mapped to upper half of the data subcarriers using the same DCM LDPC tone mapper. Maximum frequency diversity for DCM can be achieved.

Abstract: Systems and methods of expanding indication capabilities of existent PPDU preamble fields. The “GI+LTF Size” field is redefined to indicate a new combination of GI duration and HE-LTF size. The redefinition is indicated when the values of the two other existent fields, in combination, indicate an invalid scenario because the two values should have been mutually exclusive. Particularly, the DCM field and the STBC field are both set to the “enabled” mode as an indication for redefine the “GI+LTF Size” field. Upon receiving such a PPDU, a receiver is configured to resolve the PPDU as neither DCM nor STBC is enabled. Rather, the receiver interprets the particular combination of DCM and STBC values as an indication that the “GI+LTF Size” field is redefined to indicate the new combination of GI duration and HE-LTF size.