US9271241B2 - Access point and methods for distinguishing HEW physical layer packets with backwards compatibility - Google Patents

Access point and methods for distinguishing HEW physical layer packets with backwards compatibility Download PDF

Info

Publication number
US9271241B2
US9271241B2 US14/304,041 US201414304041A US9271241B2 US 9271241 B2 US9271241 B2 US 9271241B2 US 201414304041 A US201414304041 A US 201414304041A US 9271241 B2 US9271241 B2 US 9271241B2
Authority
US
United States
Prior art keywords
hew
ppdu
sig
stations
access point
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related, expires
Application number
US14/304,041
Other languages
English (en)
Other versions
US20150139205A1 (en
Inventor
Thomas J. Kenney
Eldad Perahia
Shahrnaz Azizi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Intel Corp
Original Assignee
Intel IP Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Intel IP Corp filed Critical Intel IP Corp
Priority to US14/304,041 priority Critical patent/US9271241B2/en
Assigned to Intel IP Corporation reassignment Intel IP Corporation ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AZIZI, SHAHRNAZ, PERAHIA, ELDAD, KENNEY, THOMAS J
Priority to BR122016015358A priority patent/BR122016015358A8/pt
Priority to EP14863362.1A priority patent/EP3072270A4/en
Priority to BR112016008411A priority patent/BR112016008411A8/pt
Priority to CN201480036658.6A priority patent/CN105379217B/zh
Priority to PCT/US2014/064599 priority patent/WO2015077056A1/en
Publication of US20150139205A1 publication Critical patent/US20150139205A1/en
Priority to US14/977,405 priority patent/US9615291B2/en
Publication of US9271241B2 publication Critical patent/US9271241B2/en
Application granted granted Critical
Assigned to INTEL CORPORATION reassignment INTEL CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Intel IP Corporation
Expired - Fee Related legal-status Critical Current
Adjusted expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR or Eb/lo
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0452—Multi-user MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
    • H04W52/267—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the information rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/38—TPC being performed in particular situations
    • H04W52/42—TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
    • H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
    • H04W52/346—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading distributing total power among users or channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • Embodiments pertain to wireless networks. Some embodiments relate to Wi-Fi networks and networks operating in accordance with the IEEE 802.11 standards. Some embodiments relate to high-efficiency wireless or high-efficiency Wi-Fi (HEW) communications in accordance with the IEEE 802.11ax draft standard.
  • HEW high-efficiency wireless or high-efficiency Wi-Fi
  • IEEE 802.11ax High Efficiency Wi-Fi (HEW) is the successor to IEEE 802.11ac standard and is intended to increase the efficiency of wireless local-area networks (WLANs).
  • HEW's goal is to provide up to four-times or more the throughput of IEEE 802.11ac standard.
  • HEW may be particularly suitable in high-density hotspot and cellular offloading scenarios with many devices competing for the wireless medium may have low to moderate data rate requirements.
  • the Wi-Fi standards have evolved from IEEE 802.11b to IEEE 802.11g/a to IEEE 802.11n to IEEE 802.11ac and now to IEEE 802.11ax. In each evolution of these standards, there were mechanisms to afford coexistence with the previous standard. For HEW, the same requirement exists for coexistence with legacy devices and systems.
  • FIG. 1 illustrates a wireless network in accordance with some embodiments
  • FIG. 2A illustrates a non-HT (high-throughput) format packet protocol data unit (PPDU) in accordance with some embodiments
  • FIG. 2B illustrates a HT mixed-format PPDU in accordance with some embodiments
  • FIG. 2C illustrates a VHT (very-high throughput) format PPDU in accordance with some embodiments
  • FIG. 2D illustrates a HEW format PPDU in accordance with some embodiments
  • FIG. 2E illustrates a HEW format PPDU for single-stream transmissions in accordance with some embodiments
  • FIG. 2F illustrates a HEW format PPDU for multi-stream transmissions with transmit beamforming in accordance with some alternate embodiments
  • FIG. 2G illustrates a HEW format PPDU for multi-stream transmissions without transmit beamforming in accordance with some embodiments
  • FIG. 3 illustrates signal field constellations in accordance with some embodiments
  • FIG. 4 is a procedure for configuring a PPDU for communicating with HEW stations and legacy stations in accordance with some embodiments.
  • FIG. 5 is a block diagram of an HEW device in accordance with some embodiments.
  • Embodiments disclosed herein provide for coexistence of High Efficiency Wi-Fi (HEW) devices with existing legacy Wi-Fi devices.
  • Legacy devices may refer to devices operating in accordance with previous Wi-Fi standards and/or amendments such as IEEE 802.11g/a, IEEE 802.11n or IEEE 802.11ac.
  • HEW is a recent activity in IEEE to evolve the Wi-Fi standard. It has several target use cases, with a large focus on improving system efficiency in dense deployed networks. Since it is an evolution of the previous standards and needs to coexist with the legacy systems, a technique to identify each transmission as either a HEW packet or a legacy packet is needed. Additionally, it would be advantageous if the technique to identify the HEW transmissions could at the same time defer legacy devices. Finally, since one focus on HEW is efficiency, another aspect is to have a mechanism which accomplishes these things without adding any additional overhead to each transmission and possibly reducing the overhead.
  • Embodiments disclosed herein provide techniques to notify HEW devices that an HEW compliant transmission is occurring while also deferring legacy devices and doing so with little or no additional overhead from what is done in legacy transmissions and in some embodiments, less overhead. Since HEW is an evolution of the existing Wi-Fi standards, there have not been any previous solutions to address this need.
  • the preamble portion of the packet has been increased and new fields added with various modulation formats so that the new releases could be identified.
  • Some embodiments described herein are configured to defer legacy devices using the legacy signal field (L-SIG) and build upon the coexistence approach adopted in IEEE 802.11n and IEEE 802.11ac. In those systems, the rate field of the L-SIG was fixed to a set known value and the length was set to a length that would defer those devices beyond the transmission of an IEEE 802.11n or an IEEE 802.11ac transmission.
  • L-SIG legacy signal field
  • the same fixed value in the rate field may be used although this is not a requirement.
  • the length field of the L-SIG may be computed differently from what is done in an IEEE 802.11n/ac system to allow deferral of legacy systems and identification of an HEW transmission. These embodiments are described in more detail below.
  • an HEW signal field may also be used if needed and may use a modified legacy length value allowing for several preamble designs and potentially several payloads to support not only single user (SU) packets to multi-user (MU) packets like multi-user multiple-input multiple-output (MU-MIMO) or orthogonal frequency division multiple access (OFDMA).
  • SU single user
  • MU multi-user
  • OFDMA orthogonal frequency division multiple access
  • an access point may operate as a master station which would have mechanisms to contend and hold the medium. Uplink transmissions from scheduled HEW stations may immediately follow. In those cases, the AP may signal the specific devices that are targeted for uplink transmission the transmission parameters. Therefore, each device that transmits in the uplink would not need to send any additional configuration parameters and therefore does not need an additional SIG field in the preamble during their transmission.
  • Embodiments disclosed herein also allow legacy devices that missed the initial AP transmission (e.g., when returning from a power save mode) to detect the signal and properly defer irrespective of them being an IEEE 802.11a, an IEEE 802.11n or an IEEE 802.11ac device.
  • legacy devices that missed the initial AP transmission (e.g., when returning from a power save mode) to detect the signal and properly defer irrespective of them being an IEEE 802.11a, an IEEE 802.11n or an IEEE 802.11ac device.
  • a new signal field modulation format is disclosed in which the first symbol is set as rotated BPSK (i.e., rotated by 90 degrees) and then the second would be BPSK (i.e., not rotated).
  • FIG. 1 illustrates a wireless network in accordance with some embodiments.
  • Wireless network 100 may include a master station (STA) 102 , a plurality of HEW stations 104 (i.e., HEW devices), and a plurality of legacy stations 106 (legacy devices).
  • the master station 102 may be arranged to communicate with the HEW stations 104 and the legacy stations 106 in accordance with one or more of the IEEE 802.11 standards.
  • the master station 102 may be an access point (AP), although the scope of the embodiments is not limited in this respect.
  • AP access point
  • Legacy stations 106 may include, for example, non-HT stations 108 (e.g., IEEE 802.11a/g stations), HT stations 110 (e.g., IEEE 802.11n stations), and VHT stations 112 (e.g., IEEE 802.11ac stations).
  • Embodiments disclosed herein allow HEW stations 104 to distinguish transmissions (e.g., packets such as packet protocol data units (PPDUs)) from transmissions of legacy stations 106 and cause legacy stations 106 to at least defer their transmissions during HEW transmissions providing backwards compatibility.
  • the length field of the legacy signal field may be used to cause some legacy stations 106 to defer transmissions.
  • the length field of the L-SIG may be used to distinguish HEW PPDUs from non-HEW PPDUs.
  • a phase rotation applied to a subsequent or additional signal field may be used to distinguish HT PPDUs, VHT PPDUs and HEW PPDUs.
  • the rate field of the L-SIG may be used to cause some legacy stations 106 to defer transmissions and distinguish non-HT transmissions from HT, VHT and HEW transmissions.
  • the master station 102 may include hardware processing circuitry including physical layer (PHY) and medium-access control layer (MAC) circuitry which may be arranged to contend for a wireless medium (e.g., during a contention period) to receive exclusive control of the medium for an HEW control period (i.e., a transmission opportunity (TXOP)).
  • the master station 102 may transmit an HEW master-sync transmission at the beginning of the HEW control period.
  • the HEW stations 104 may communicate with the master station 102 in accordance with a non-contention based multiple-access technique (e.g., an OFDMA technique or MU-MIMO technique).
  • a non-contention based multiple-access technique e.g., an OFDMA technique or MU-MIMO technique.
  • HEW control and schedule transmission may be referred to as an HEW control and schedule transmission.
  • the master-sync transmission may include a multi-device HEW preamble arranged to signal and identify data fields for a plurality of scheduled HEW stations 104 .
  • the master station 102 may further be arranged to transmit (in the downlink direction) and/or receive (in the uplink direction) one or more of the data fields to/from the scheduled HEW stations 104 during the HEW control period.
  • the master station 102 may include training fields in the multi-device HEW preamble to allow each of the scheduled HEW stations 104 to perform an initial channel estimate.
  • an HEW station 104 may be an IEEE 802.11ax configured station (STA) that is configured for HEW operation.
  • STA IEEE 802.11ax configured station
  • An HEW station 104 may be configured to communicate with a master station 102 in accordance with a scheduled multiple access technique during the HEW control period and may be configured to receive and decode the multi-device HEW preamble of an HEW frame or PPDU.
  • An HEW station 104 may also be configured to decode an indicated data field received by the master station 102 during the HEW control period. Examples of HEW PPDUs are illustrated in FIGS. 2D through 2G discussed below.
  • the master station 102 may be arranged to select a number of HEW long-training fields (LTFs) to be included in the multi-device HEW preamble of an HEW frame.
  • the HEW frame may comprise a plurality of links for transmission of a plurality of data streams.
  • the master station 102 may also transmit the selected number of LTFs sequentially as part of the multi-device HEW preamble.
  • the master station 102 may also transmit/receive a plurality of data fields sequentially to/from each of a plurality of scheduled HEW stations 104 .
  • the data fields may be part of the HEW frame. Each data field may correspond to one of the links and may comprise one or more data streams. In some embodiments, the data fields may be separate packets.
  • the master station 102 may also be arranged receive packets from HEW stations 104 in the uplink direction during the HEW control period.
  • the selection of the number of LTFs to be included in the multi-device HEW preamble may be based on a maximum number of streams to be transmitted on a single link. In some embodiments, the selection of the number of LTFs to be included in the multi-device HEW preamble may be based on a scheduled HEW station 104 with a greatest channel estimation need (e.g., the scheduled HEW station 104 receiving the greatest number of streams on a single link). In some embodiments, the selection of the number of LTFs to be included in the multi-device HEW preamble may be based on the sum of greatest number of streams on each single link that scheduled HEW stations 104 would receive.
  • the number of LTFs to be included in the multi-device HEW preamble may be predetermined. In these embodiments, the number of LTFs to be included in the multi-device HEW preamble may be based on the maximum number of streams that can be transmitted on a single link.
  • the master station 102 may be arranged to configure the multi-device HEW preamble include an HEW control signal field (i.e., HEW SIG-B) to identify and signal each of the data fields of the HEW frame.
  • HEW SIG-B HEW control signal field
  • a single HEW preamble is included in an HEW frame, which is unlike conventional techniques which include a preamble for each link.
  • FIG. 2A illustrates a non-HT format PPDU in accordance with some embodiments.
  • the non-HT format PPDU may be used for communicating with non-HT stations 108 ( FIG. 1 ), which may include stations configured to communicate in accordance with an IEEE 802.11a or IEEE 802.11g standard.
  • the packet structure comprises a Legacy Short Training Field (L-STF) 202 , a Legacy Long Training Field (L-LTF) 204 and the L-SIG 206 which made up the preamble.
  • the preamble is followed by a data field 208 .
  • the L-SIG 206 provides information about the data field 208 including the coding and modulation (rate) and the length.
  • FIG. 2B illustrates a HT mixed-format PPDU in accordance with some embodiments.
  • the HT mixed-format PPDU may be used for communicating with HT stations 110 ( FIG. 1 ), which may include stations configured to communicate in accordance with an IEEE 802.11n standard.
  • IEEE 802.11n the packet structure allows the IEEE 802.11n devices to coexist with IEEE 802.11a/g devices and therefore included the legacy preamble portion of the packet to be used at the beginning of the transmission.
  • the IEEE 802.11n transmission sets the rate field of the L-SIG 206 to a fixed rate and the length field is set to extend for the full duration of the IEEE 802.11n packet.
  • the IEEE 802.11n preamble includes a HT-SIG 212 for the IEEE 802.11n and includes additional configuration information for those devices.
  • the HT-SIG 212 uses rotated binary phase-shift keying (BPSK) in both symbols of the HT-SIG 212 so that IEEE 802.11n devices can distinguish it from non-rotated BPSK data 208 of an IEEE 802.11a/g transmission and allows those devices to detect the existence of an IEEE 802.11n packet.
  • BPSK binary phase-shift keying
  • FIG. 2C illustrates a VHT format PPDU in accordance with some embodiments.
  • the VHT format PPDU may be used for communicating with VHT stations 112 ( FIG. 1 ), which may include stations configured to communicate in accordance with an IEEE 802.11ac standard.
  • the packet also starts with the legacy portion of the preamble which is then followed by a VHT-SIG 222 to provide additional configuration parameters for the VHT data field.
  • the IEEE 802.11a/g devices recognize the legacy portion of the packet but would decode the rest of the packet correctly and thus defer from transmission for the full length based on the legacy rate/length fields.
  • IEEE 802.11ac devices are also able to discern IEEE 802.11ac packets from other legacy (IEEE 802.11a/g and IEEE 802.11n) packets.
  • IEEE 802.11n the HT-SIG field 212 ( FIG. 2B ) following the L-SIG 206 is modulated using BPSK as in the L-SIG 206 , but it is rotated 90 degrees. This modulation format may be used by an IEEE 802.11n device to detect those packets and identify them as IEEE 802.11n packets.
  • IEEE 802.11ac devices For IEEE 802.11ac devices to detect IEEE 802.11ac packets, the VHT-SIG 222 ( FIG.
  • VHT-SIG 222 is normal BPSK for the first symbol of the VHT-SIG 222 and is rotated 90 degrees for the second symbol. This allows for the identification of IEEE 802.11ac packets by IEEE 802.11ac devices, but demodulation of the VHT-SIG 222 may not be possible by the IEEE 802.11n devices. In those cases the IEEE 802.11n device will defer based on the L-SIG 206 .
  • FIGS. 2D-2G illustrate HEW format PPDUs in accordance with various embodiments.
  • the HEW formats PPDU of FIGS. 2D-2G may be used for communicating with HEW stations 104 ( FIG. 1 ), which may include stations configured to communicate in accordance with an IEEE 802.11x standard.
  • the master station 102 FIG. 1
  • L-SIG legacy signal field
  • the L-SIG 206 may be configured to include at least a length field and a rate field.
  • the master station 102 may select a value for the length field that is non-divisible by three for communicating with the HEW stations 104 and may select a value for the length field that is divisible by three for communicating with at least some legacy stations 106 .
  • at least some legacy stations 106 i.e., HT stations 110 and VHT stations 112
  • HEW stations 104 may be configured to identify the PPDU as an HEW PPDU and decode one or more of the fields that follow the L-SIG 206 .
  • the master station 102 is further arranged to configure the L-SIG 206 with a valid parity bit (i.e., the L-SIG parity bit) when the length field is selected to be divisible by three and when the length field is selected to be non-divisible by three.
  • the L-SIG may always be configured with a valid parity bit.
  • the physical layer (PHY) of a device may maintain a busy indication for the predicted duration of the PPDU.
  • legacy stations 106 will defer for the value indicated by the length (L_LENGTH) field in the L-SIG 206 even if the value is invalid (i.e., not divisible by three) as long as the parity bit is valid.
  • the master station 102 may multiply a ceiling function by three and subtract either two or one to calculate the value for the length field for the HEW PPDUs. By multiplying the ceiling function by three and then subtracting two or one assures that the length field is not divisible by three.
  • the master station 102 may multiply the ceiling function by three and subtract three to calculate the value for the length field for HT and VHT PPDUs. By multiplying the ceiling function by three and then subtracting three assures that the length field is divisible by three.
  • the length calculation used to populate the L-SIG for 0.11ac packets is give as (L_LENGTH):
  • the T variable is the time for the respective portions of the packet and variables T SYMS , T SYM and N SYM represent the short GI symbol interval, symbol interval and number of symbols in a packet respectively.
  • the equation in the L_LENGTH calculation uses a ceiling function multiplied by three and then three is subtracted. For any value of TXTIME, the L_LENGTH will be divisible by three. Thus, for HEW packets, embodiments disclosed herein may set the L_LENGTH to a value that is not divisible by three.
  • the expression for L_LENGTH for HEW packets may be:
  • Legacy stations 106 would decode the L-SIG, and defer for a time based on the L_LENGTH value regardless of the value.
  • the master station 102 may be arranged to configure the PPDU to include a subsequent/additional signal field 210 (e.g., HT-SIG 212 , VHT-SIG 222 , or HEW-SIG 232 ) following the L-SIG 206 .
  • the subsequent signal field 210 may have first and second symbols that are BPSK modulated.
  • the master station 102 may select a phase rotation for application to the BPSK modulation of at least one of the first and second symbols of the subsequent signal field 210 to distinguish a HT PPDU ( FIG. 2B ), a VHT PPDU ( FIG. 2C ) and an HEW PPDU ( FIGS. 2D-2G ). These embodiments are discussed in more detail below.
  • the master station 102 may configure the PPDU to include a number of long-training fields (LTFs) 234 to be included in a multi-device HEW preamble the PPDU.
  • the number of LTFs 234 may be based on a maximum number of streams communicated over a link.
  • the master station 102 may contend for a wireless medium during a contention period to receive control of the medium for an HEW control period (i.e., a TXOP) and may transmit the PPDU during the HEW control period.
  • HEW control period i.e., a TXOP
  • the master station 102 may operate as a master station having exclusive use of the wireless medium for communication of data with a plurality of scheduled HEW stations 104 in accordance with a non-contention based scheduled OFDMA technique in accordance with signaling information indicated in an HEW signal field.
  • the scheduled OFDMA technique may, for example, be an uplink (UL) OFDMA technique, a downlink (DL) OFDMA technique or an UL or DL multi-user multiple-input multiple-output (MU-MIMO) technique.
  • each data field may be associated with either a single user (SU) link or a multi-user (MU) link and each link may be configurable to provide multiple streams of data.
  • the links of the HEW PPDU may be configurable to have a bandwidth of one of 20 MHz, 40 MHz, 80 MHz or 160 MHz.
  • FIG. 2E illustrates a HEW format PPDU for single-stream transmissions in accordance with some embodiments.
  • all signaling information for transmission of a single stream over a link may be included within the HEW-SIG 232 eliminating the need for one or more HEW LTFs and an HEW SIG B field.
  • the multi-stream HEW format PPDU of FIG. 2D includes a number of LTFs 234 based on a maximum number of streams communicated over a link and an HEW SIG-B field.
  • FIG. 2F illustrates a HEW format PPDU for multi-stream transmissions with transmit beamforming in accordance with some embodiments.
  • the signaling information from the HEW-SIG-B field may be included within the HEW-SIG 232 eliminating the need for a second signal field (e.g., an HEW SIG B field).
  • the number of HEW LTFs 234 may be based on a maximum number of streams communicated over the link and an HEW STF 233 may be included for transmit beamforming.
  • FIG. 2G illustrates a HEW format PPDU for multi-stream transmissions without transmit beamforming in accordance with some embodiments.
  • the signaling information from the HEW-SIG-B field may be included within the HEW-SIG 232 eliminating the need for a second signal field (e.g., an HEW SIG B field).
  • the number of HEW LTFs 234 may be based on a maximum number of streams communicated over the link and an HEW STF may not be needed since transmit beamforming is not performed.
  • FIG. 3 illustrates signal field constellations in accordance with some embodiments.
  • the L-SIG 206 for non-HT stations 108 , for HT stations 110 , for VHT stations 112 and for HEW stations 104 is illustrated with conventional BPSK modulation (i.e., no phase rotation is applied).
  • BPSK modulation i.e., no phase rotation is applied.
  • a selected phase rotation for application to the BPSK modulation of the first and second symbols of the subsequent signal field 210 is shown.
  • the subsequent signal field 210 may be an HEW signal field (HEW-SIG) 232 ( FIGS. 2D-2G ) and the master station 102 may apply a ninety-degree phase rotation to the BPSK modulation of the first symbol 332 A of the HEW-SIG 232 (i.e., rotated BPSK) and may refrain from applying a ninety-degree phase rotation to the BPSK modulation of the second symbol 332 B of the HEW-SIG 232 .
  • the first symbol 332 A of the HEW-SIG 232 is rotated BPSK and the second symbol 332 B is conventional (i.e., non-rotated) BPSK.
  • the subsequent signal field 210 may be an VHT signal field (VHT-SIG) 222 ( FIG. 2C ) and the master station 102 may refrain from applying a ninety-degree phase rotation to the BPSK modulation of the first symbol 322 A of the VHT-SIG 222 and may apply a ninety-degree phase rotation to the BPSK modulation of the second symbol 322 B of the VHT-SIG 222 .
  • VHT-SIG VHT signal field
  • the master station 102 may refrain from applying a ninety-degree phase rotation to the BPSK modulation of the first symbol 322 A of the VHT-SIG 222 and may apply a ninety-degree phase rotation to the BPSK modulation of the second symbol 322 B of the VHT-SIG 222 .
  • the first symbol 322 A of the VHT-SIG 222 is conventional BPSK and the second symbol 322 B is rotated BPSK.
  • the subsequent signal field 210 may be an HT signal field (HT-SIG) 212 ( FIG. 2B ) and the master station 102 may apply a ninety-degree phase rotation to the BPSK modulation of both the first symbol 312 A and the second symbol 312 B of the HT-SIG 222 . Accordingly, for a HT PPDU, both symbols of the HT-SIG 222 are rotated BPSK.
  • HTTP-SIG HT signal field
  • the access point may refrain from including the subsequent signal field 210 following the L-SIG 206 .
  • the data field 208 of a non-HT PPDU may have conventional (non-phase rotated) modulation (e.g., BPSK to 64QAM) applied for all symbols allowing a non-HT PPDU to be identified and distinguished from other HT, VHT and HEW PPDUs.
  • the phase rotation of the symbols in the subsequent signal field 210 may be used to distinguish an HEW PPDU from a non-HEW PPDU, such as a HT PPDU or a VHT PPDU.
  • a non-HEW PPDU such as a HT PPDU or a VHT PPDU.
  • the length field may be set to a value that is divisible by three, although the scope of the embodiments is not limited in this respect.
  • the length field may also be used to distinguish an HEW PPDU from a non-HEW PPDU, such as a HT PPDU or a VHT PPDU.
  • the master station 102 may select a value for the rate field to cause the non-HT stations 108 to defer transmissions.
  • the non-HT stations 108 may correctly decode the L-SIG 206 but may be unable to correctly decode the remainder of the PPDU based on the indicated rate (or the cyclic-redundancy check (CRC) may fail) causing these stations to ignore the PPDU but defer based on the length indicated in the length field of the L-SIG 206 .
  • a predetermined value e.g., 5 or 6 may be selected for the rate field which may cause the non-HT stations 108 to defer their transmissions because of their inability to decode the subsequent fields.
  • FIG. 4 is a procedure for configuring a PPDU for communicating with HEW stations and legacy stations in accordance with some embodiments.
  • Procedure 400 may be performed by an access point, such as master station 102 ( FIG. 1 ), for communicating with HEW stations 104 ( FIG. 1 ) as well as legacy stations 106 ( FIG. 1 ).
  • a PPDU is configured to include one or more legacy training fields and a legacy signal field (L-SIG) 206 following the legacy training fields.
  • L-SIG legacy signal field
  • the L-SIG 206 is configured to include at least a length field.
  • a value for the length field that is not divisible by three is selected for communicating with the HEW stations 104 .
  • a value for the length field that is divisible by three is selected for communicating with at least some legacy stations 106 .
  • the PPDU is configured to include an additional signal field following the L-SIG 206 .
  • a phase rotation is selected for application to the BPSK modulation of at least one of the first and second symbols of the additional signal field to distinguish a HT PPDU, a VHT PPDU and an HEW PPDU.
  • operation 412 may be optional as the value selected for the length field in operations 406 and 408 may be used to distinguish HEW from non-HEW PPDUs.
  • the value for the length field that is divisible by three is selected for communicating with all stations and the phase rotation of the symbols of the additional signal field may be used to distinguish a HT PPDU, a VHT PPDU and an HEW PPDU.
  • FIG. 5 illustrates an HEW device in accordance with some embodiments.
  • HEW device 500 may be an HEW compliant device that may be arranged to communicate with one or more other HEW devices, such as HEW stations 104 ( FIG. 1 ) or master station 102 ( FIG. 1 ) as well as communicate with legacy stations 106 ( FIG. 1 ).
  • HEW device 500 may be suitable for operating as master station 102 ( FIG. 1 ) or an HEW station 104 ( FIG. 1 ).
  • HEW device 500 may include, among other things, physical layer (PHY) circuitry 502 and medium-access control layer circuitry (MAC) 504 .
  • PHY physical layer
  • MAC medium-access control layer circuitry
  • PHY 502 and MAC 504 may be HEW compliant layers and may also be compliant with one or more legacy IEEE 802.11 standards.
  • MAC 504 may be arranged to configure PPDUs in accordance with one or more of FIGS. 2A-2G and PHY 502 may be arranged to transmit and receive PPDUs, among other things.
  • HEW device 500 may also include other hardware processing circuitry 506 and memory 508 configured to perform the various operations described herein.
  • the HEW device 500 when operating as an HEW station 104 , may be arranged to distinguish an HEW PPDU from a non-HEW PPDU based at least in part on a value in a length field in the L-SIG 206 ( FIGS. 2A-2G ).
  • the HEW device 500 may be configured to receive L-SIG 206 following legacy training fields (i.e., L-STF 202 and L-LTF 204 ).
  • the L-SIG 206 may include the length field and a rate field.
  • the HEW device 500 may determine whether a value for the length field is divisible by three and verify a parity bit of the L-SIG.
  • the HEW device 500 may identify the PPDU as an HEW PPDU when the value in the length field is not divisible three and the parity bit is verified, and may identify the PPDU as a non-HEW PPDU (e.g., a VHT PPDU or HT PPDU) when the value in the length field is divisible three and the parity bit is verified.
  • the HEW device 500 may also be configured to decode subsequent fields of the PPDU when identified as an HEW PPDU and refrain from decoding subsequent fields of the PPDU when the PPDU is identified as a non-HEW PPDU.
  • the HEW device 500 when operating as an HEW station 104 , may be arranged to distinguish an HEW PPDU from a non-HEW PPDU based on the phase rotation of symbols of a subsequent signal field.
  • the HEW device 500 may be configured to receive an L-SIG 206 and receive a subsequent signal field 210 (HT-SIG 212 , VHT-SIG 222 , or HEW-SIG 232 ).
  • the subsequent signal field 210 may have first and second symbols that are BPSK modulated.
  • the HEW device 500 may determine whether the PPDU is a HT PPDU, a VHT PPDU or an HEW PPDU based on the phase rotation applied to the BPSK modulation of at least one of the first and second symbols of the subsequent signal field 210 .
  • a ninety-degree phase rotation may have been applied to the BPSK modulation of the first symbol 332 A and no phase rotation would have been applied to the BPSK modulation of the second symbol 332 B of the subsequent signal field 210 .
  • the MAC 504 may be arranged to contend for a wireless medium during a contention period to receive control of the medium for the HEW control period and configure an HEW PPDU (e.g., FIG. 2D ).
  • the PHY 502 may be arranged to transmit the HEW PPDU as discussed above.
  • the PHY 502 may include circuitry for modulation/demodulation, upconversion/downconversion, filtering, amplification, etc.
  • the hardware processing circuitry 506 may include one or more processors.
  • two or more antennas may be coupled to the PHY 502 and arranged for sending and receiving signals including transmission of the HEW packets.
  • the memory 508 may be store information for configuring the other circuitry to perform operations for configuring and transmitting HEW packets and performing the various operations described herein.
  • the HEW device 500 may be configured to communicate using OFDM communication signals over a multicarrier communication channel.
  • HEW device 500 may be configured to communicate in accordance with one or more specific communication standards, such as the Institute of Electrical and Electronics Engineers (IEEE) standards including IEEE 802.11-2012, 802.11n-2009, 802.11ac-2013, 802.11ax standards and/or proposed specifications for WLANs, although the scope of the invention is not limited in this respect as they may also be suitable to transmit and/or receive communications in accordance with other techniques and standards.
  • IEEE Institute of Electrical and Electronics Engineers
  • the HEW device 500 may be part of a portable wireless communication device, such as a personal digital assistant (PDA), a laptop or portable computer with wireless communication capability, a web tablet, a wireless telephone or smartphone, a wireless headset, a pager, an instant messaging device, a digital camera, an access point, a television, a medical device (e.g., a heart rate monitor, a blood pressure monitor, etc.), or other device that may receive and/or transmit information wirelessly.
  • the HEW device 500 may include one or more of a keyboard, a display, a non-volatile memory port, multiple antennas, a graphics processor, an application processor, speakers, and other mobile device elements.
  • the display may be an LCD screen including a touch screen.
  • the antennas of the HEW device 500 may comprise one or more directional or omnidirectional antennas, including, for example, dipole antennas, monopole antennas, patch antennas, loop antennas, microstrip antennas or other types of antennas suitable for transmission of RF signals.
  • the antennas may be effectively separated to take advantage of spatial diversity and the different channel characteristics that may result between each of antennas and the antennas of a transmitting station.
  • the HEW device 500 is illustrated as having several separate functional elements, one or more of the functional elements may be combined and may be implemented by combinations of software-configured elements, such as processing elements including digital signal processors (DSPs), and/or other hardware elements.
  • DSPs digital signal processors
  • some elements may comprise one or more microprocessors, DSPs, field-programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), radio-frequency integrated circuits (RFICs) and combinations of various hardware and logic circuitry for performing at least the functions described herein.
  • the functional elements of the HEW device 500 may refer to one or more processes operating on one or more processing elements.
  • Embodiments may be implemented 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 to perform the operations described herein.
  • a computer-readable storage device may include any non-transitory mechanism for storing information in a form readable by a machine (e.g., a computer).
  • a computer-readable storage device may 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 configured with instructions stored on a computer-readable storage device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)
US14/304,041 2013-11-19 2014-06-13 Access point and methods for distinguishing HEW physical layer packets with backwards compatibility Expired - Fee Related US9271241B2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US14/304,041 US9271241B2 (en) 2013-11-19 2014-06-13 Access point and methods for distinguishing HEW physical layer packets with backwards compatibility
CN201480036658.6A CN105379217B (zh) 2013-11-19 2014-11-07 用于区分具有后向兼容性的hew物理层分组的接入点和方法
EP14863362.1A EP3072270A4 (en) 2013-11-19 2014-11-07 Access point and methods for distinguishing hew physical layer packets with backwards compatibility
BR112016008411A BR112016008411A8 (pt) 2013-11-19 2014-11-07 Ponto de acesso e métodos para distinguir pacotes de camada física hew com compatibilidade com versões anteriores
BR122016015358A BR122016015358A8 (pt) 2013-11-19 2014-11-07 Ponto de acesso e métodos para distinguir pacotes de camada física hew com compatibilidade com versões anteriores
PCT/US2014/064599 WO2015077056A1 (en) 2013-11-19 2014-11-07 Access point and methods for distinguishing hew physical layer packets with backwards compatibility
US14/977,405 US9615291B2 (en) 2013-11-19 2015-12-21 High-efficiency station (STA) and method for decoding an HE-PPDU

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US201361906059P 2013-11-19 2013-11-19
US201461973376P 2014-04-01 2014-04-01
US201461976951P 2014-04-08 2014-04-08
US201461986250P 2014-04-30 2014-04-30
US201461986256P 2014-04-30 2014-04-30
US201461991730P 2014-05-12 2014-05-12
US14/304,041 US9271241B2 (en) 2013-11-19 2014-06-13 Access point and methods for distinguishing HEW physical layer packets with backwards compatibility

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US14/977,405 Continuation US9615291B2 (en) 2013-11-19 2015-12-21 High-efficiency station (STA) and method for decoding an HE-PPDU

Publications (2)

Publication Number Publication Date
US20150139205A1 US20150139205A1 (en) 2015-05-21
US9271241B2 true US9271241B2 (en) 2016-02-23

Family

ID=53173243

Family Applications (3)

Application Number Title Priority Date Filing Date
US14/304,041 Expired - Fee Related US9271241B2 (en) 2013-11-19 2014-06-13 Access point and methods for distinguishing HEW physical layer packets with backwards compatibility
US14/315,562 Active 2034-07-16 US9462504B2 (en) 2013-11-19 2014-06-26 Transmit time offset in uplink multi-user multiple input-multiple output system
US14/977,405 Active US9615291B2 (en) 2013-11-19 2015-12-21 High-efficiency station (STA) and method for decoding an HE-PPDU

Family Applications After (2)

Application Number Title Priority Date Filing Date
US14/315,562 Active 2034-07-16 US9462504B2 (en) 2013-11-19 2014-06-26 Transmit time offset in uplink multi-user multiple input-multiple output system
US14/977,405 Active US9615291B2 (en) 2013-11-19 2015-12-21 High-efficiency station (STA) and method for decoding an HE-PPDU

Country Status (5)

Country Link
US (3) US9271241B2 (enrdf_load_stackoverflow)
EP (1) EP3072270A4 (enrdf_load_stackoverflow)
CN (1) CN105379217B (enrdf_load_stackoverflow)
BR (1) BR112016008411A8 (enrdf_load_stackoverflow)
WO (1) WO2015077056A1 (enrdf_load_stackoverflow)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150312907A1 (en) * 2014-04-28 2015-10-29 Newracom, Inc. Method for transmitting frame and method for detecting transmission mode
US20160242177A1 (en) * 2015-02-17 2016-08-18 Newracom, Inc. Method and apparatus for frame exchange in a high efficiency wireless lan
US9450725B2 (en) 2013-11-19 2016-09-20 Intel IP Corporation Wireless apparatus for high-efficiency (HE) communication with additional subcarriers
US9544914B2 (en) 2013-11-19 2017-01-10 Intel IP Corporation Master station and method for HEW communication using a transmission signaling structure for a HEW signal field
US9615291B2 (en) 2013-11-19 2017-04-04 Intel IP Corporation High-efficiency station (STA) and method for decoding an HE-PPDU
US9685999B2 (en) 2014-06-27 2017-06-20 Techflux, Ltd. Method and device for transmitting data unit
US9900906B2 (en) 2013-11-19 2018-02-20 Intel IP Corporation Method, apparatus, and computer readable medium for multi-user scheduling in wireless local-area networks
US9961678B2 (en) 2013-11-19 2018-05-01 Intel IP Corporation Master station and method for HEW communication with signal field configuration for HEW OFDMA MU-MIMO wideband channel operation
US11153418B2 (en) 2018-11-15 2021-10-19 Nxp B.V. Wireless vehicular communications with dynamic-based relationships
US11240814B2 (en) 2019-03-13 2022-02-01 Nxp B.V. Wireless vehicular communications with channel allocation involving different protocols
US20230247082A1 (en) * 2022-02-02 2023-08-03 Servicenow, Inc. System and method for deferring data retrieval
US11778667B2 (en) 2020-06-05 2023-10-03 Nxp B.V. Mitigating interference in channel access involving multiple systems
US11867827B2 (en) 2019-05-03 2024-01-09 Nxp B.V. Radar sensing
US12388498B2 (en) 2014-05-08 2025-08-12 AX Wireless, LLC Method, apparatus, and computer readable media for acknowledgement in wireless networks

Families Citing this family (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014203297A1 (ja) * 2013-06-21 2014-12-24 富士通株式会社 送信装置、受信装置、送信方法および受信方法
US10194006B2 (en) * 2013-10-25 2019-01-29 Marvell World Trade Ltd. Physical layer frame format for WLAN
KR20160077134A (ko) 2013-10-25 2016-07-01 마벨 월드 트레이드 리미티드 와이파이를 위한 레인지 확장 모드
CN105612698A (zh) * 2013-11-19 2016-05-25 英特尔Ip公司 具有精简的信号字段的帧结构和用于高效wi-fi(hew)通信的方法
KR101721293B1 (ko) * 2013-12-31 2017-04-10 한국전자통신연구원 무선랜 시스템에서 채널을 추정하는 장치 및 방법
EP3161990A4 (en) 2014-06-27 2018-03-14 Techflux Ltd. Bandwidth signaling
US9936492B2 (en) * 2014-07-11 2018-04-03 Qualcomm Incorporated Methods and systems for multi user uplink compatibility with legacy devices
US10009922B2 (en) * 2014-07-15 2018-06-26 Marvell World Trade Ltd. Channel frame structures for high efficiency wireless LAN (HEW)
KR20160019383A (ko) * 2014-08-11 2016-02-19 뉴라컴 인코포레이티드 고효율 무선랜의 물리계층 프로토콜 데이터 유닛 포맷
US10237753B2 (en) 2014-08-11 2019-03-19 Electronics And Telecommunications Research Institute Method for transmitting frame using selective beamforming and apparatus for performing the method
KR20160022791A (ko) * 2014-08-20 2016-03-02 뉴라컴 인코포레이티드 고효율 무선랜에서 공간 시간 블록 코딩이 적용된 물리계층 프로토콜 데이터 유닛 포맷
CA2958756C (en) * 2014-08-21 2019-06-04 Lg Electronics Inc. Method for uplink transmission in wireless communication system and apparatus therefor
US9838513B2 (en) * 2014-09-19 2017-12-05 Qualcomm Incorporated Methods and apparatus for packet acquisition in mixed-rate wireless communication networks
KR20160041007A (ko) * 2014-10-06 2016-04-15 뉴라컴 인코포레이티드 고효율 무선랜에서 빔포밍된 전송
US20160105535A1 (en) * 2014-10-08 2016-04-14 Intel Corporation Systems and methods for signal classification
JP6784675B2 (ja) * 2014-12-09 2020-11-11 マイリオタ ピーティーワイ エルティーディーＭｙｒｉｏｔａ Ｐｔｙ Ｌｔｄ マルチキャリア通信システム
US9942925B2 (en) * 2015-01-07 2018-04-10 Qualcomm, Incorporated Station contention behavior in uplink multiple user protocols
US9806927B2 (en) 2015-01-21 2017-10-31 Intel IP Corporation Method, apparatus, and computer readable medium for signaling high efficiency packet formats using a legacy portion of the preamble in wireless local-area networks
US9847896B2 (en) 2015-01-21 2017-12-19 Intel IP Corporation Method, apparatus, and computer readable medium for signaling high efficiency packet formats using a legacy portion of the preamble in wireless local-area networks
US9998185B2 (en) * 2015-03-27 2018-06-12 Newracom, Inc. Aggregation methods and systems for multi-user MIMO or OFDMA operation
US10116360B2 (en) 2015-04-23 2018-10-30 Newracom, Inc. Method and apparatus for uplink multi-user transmission in a high efficiency wireless LAN
CN107455002B (zh) * 2015-05-05 2020-07-14 华为技术有限公司 物理层协议数据单元的传输方法和装置
US10084657B2 (en) * 2015-06-29 2018-09-25 Ca, Inc. Normalized software-defined networking interface
US10003498B2 (en) 2015-06-29 2018-06-19 Ca, Inc. Efficient management of network configuration-dependent network functionality
US20170013603A1 (en) * 2015-07-07 2017-01-12 Qualcomm Incorporated Techniques for transmitting/receiving wireless local area network information
WO2017011179A1 (en) * 2015-07-14 2017-01-19 Intel IP Corporation Short resource requests
US10122508B2 (en) * 2015-07-31 2018-11-06 Lg Electronics Inc. Method and apparatus for configuring a long training field in a wireless local area network system
EP3337117B1 (en) * 2015-08-12 2020-04-22 LG Electronics Inc. Method for transmitting signals in dcm mode in wireless lan system, and device for same
US20170064718A1 (en) * 2015-08-25 2017-03-02 Qualcomm Incorporated Resource allocation signaling in a wireless local area network preamble
JP6664125B2 (ja) * 2015-10-30 2020-03-13 パナソニックＩｐマネジメント株式会社 パケットフォーマット検出のための送信方法および送信装置
WO2017078800A1 (en) * 2015-11-05 2017-05-11 Intel IP Corporation Resource allocation in full-band multiuser multiple-input multiple-output communications
CN105722146B (zh) * 2016-03-25 2019-07-09 珠海市魅族科技有限公司 无线局域网的通信方法及通信装置、接入点和站点
CN105703887B (zh) * 2016-04-08 2018-08-31 西安电子科技大学 一种IEEE802.11ax网络的多站点块确认方法
US10292101B2 (en) * 2016-05-11 2019-05-14 Qualcomm Incorporated Peak-to-average power management in wireless local area network signaling
US11051297B2 (en) * 2016-06-30 2021-06-29 Qualcomm Incorporated Spatial reuse and transmit opportunity duration representation
EP3342115B8 (en) * 2016-11-03 2021-09-08 Intel Corporation Long training field size indication
US20180124866A1 (en) * 2016-11-03 2018-05-03 Qualcomm Incorporated Techniques for high efficiency basic service set operation
EP4142381B1 (en) * 2018-07-03 2024-05-01 LG Electronics, Inc. Method and device for identifying packet in wireless lan system
CN116488773A (zh) 2018-07-06 2023-07-25 华为技术有限公司 通信方法、装置及设备
EP3826257A4 (en) * 2018-09-07 2021-09-22 LG Electronics Inc. METHOD AND DEVICE FOR APPLYING OPTIMIZED PHASE TRANSPOSITION IN A WLAN ENVIRONMENT INCLUDING WIRELESS DEVICES HAVING DIFFERENT MAXIMUM TRANSMISSIBLE RF BANDWIDTHS
WO2020085783A1 (ko) * 2018-10-23 2020-04-30 엘지전자 주식회사 무선 통신 시스템에서 시그널 필드를 구성하는 기법
US11996966B2 (en) 2019-08-12 2024-05-28 Lg Electronics Inc. Method and apparatus for receiving PPDU through broadband in wireless LAN system
US11095488B2 (en) 2019-08-19 2021-08-17 Cisco Technology, Inc. Optimized performance with mixed media access protocols
CN120474887A (zh) 2020-07-02 2025-08-12 Lg 电子株式会社 在无线局域网系统中接收其中数据被复制并应用相位旋转的ppdu的方法和装置
US11997523B2 (en) * 2020-10-26 2024-05-28 Mediatek Singapore Pte. Ltd. Efficient trigger-based multi-user uplink transmissions in wireless local area networks
WO2022131683A1 (en) 2020-12-16 2022-06-23 Samsung Electronics Co., Ltd. Method and device for transmitting and receiving uplink signal in wireless communication system supporting cooperative communication

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100091673A1 (en) * 2008-10-14 2010-04-15 Sony Corporation Wireless communication apparatus and wireless communication, and computer program
US20100107042A1 (en) * 2008-10-28 2010-04-29 Sony Corporation Wireless communication apparatus, wireless communication method, and computer program
US20110096685A1 (en) * 2009-10-26 2011-04-28 Electronics And Telecommunications Research Institute Packet mode auto-detection in multi-mode wireless communication system, signal field transmission for the packet mode auto-detection, and gain control based on the packet mode
US20110116401A1 (en) * 2009-11-13 2011-05-19 Raja Banerjea Multi-Channel Wireless Communications
US20110206156A1 (en) * 2010-02-23 2011-08-25 Electronics And Telecommunications Research Institute Method and apparatus for transmitting/receiving data in wireless communication system

Family Cites Families (113)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MXPA05001714A (es) 2002-08-13 2005-04-19 Nokia Corp Intercalacion de simbolo.
US7236535B2 (en) 2002-11-19 2007-06-26 Qualcomm Incorporated Reduced complexity channel estimation for wireless communication systems
US7809020B2 (en) 2003-10-31 2010-10-05 Cisco Technology, Inc. Start of packet detection for multiple receiver combining and multiple input multiple output radio receivers
KR100600672B1 (ko) 2003-11-28 2006-07-13 삼성전자주식회사 직교주파수분할다중접속 시스템에서의 파일롯 서브캐리어할당 방법과 송신 방법 및 그 장치, 수신 방법 및 그 장치
US8699508B2 (en) * 2003-12-18 2014-04-15 Intel Corporation Response scheduling for multiple receivers
US7649833B2 (en) 2003-12-29 2010-01-19 Intel Corporation Multichannel orthogonal frequency division multiplexed receivers with antenna selection and maximum-ratio combining and associated methods
WO2005074305A1 (en) 2004-01-29 2005-08-11 Neocific, Inc. Methods and apparatus for multi-carrier, multi-cell wireless communication networks
EP1759496A1 (en) 2004-06-09 2007-03-07 Philips Intellectual Property & Standards GmbH Wireless communication system, wireless communication device for use as a station in a wireless communication system, a method of communication within a wireless communication system
US8619907B2 (en) 2004-06-10 2013-12-31 Agere Systems, LLC Method and apparatus for preamble training in a multiple antenna communication system
US7742388B2 (en) 2004-07-20 2010-06-22 Daniel Shearer Packet generation systems and methods
KR100895184B1 (ko) 2004-08-04 2009-04-24 삼성전자주식회사 광대역 무선 접속 시스템에서 다중 운영 프로파일 기지국간 핸드오프 방법 및 시스템
US7558328B2 (en) 2004-09-09 2009-07-07 Agere Systems Inc. Method and apparatus for increasing data throughput in a multiple antenna communication system using additional subcarriers
EP1851926B1 (en) 2005-02-09 2015-04-08 Agere Systems, Inc. Method and apparatus for preamble training with shortened long training field in a multiple antenna communication system
DE502006001421D1 (de) 2005-05-02 2008-10-09 Nokia Siemens Networks Gmbh Funkkommunikation mit OFDMA und IFDMA
KR100643299B1 (ko) * 2005-06-09 2006-11-10 삼성전자주식회사 고속 무선 네트워크에서 레거시 방식의 데이터를송수신하는 방법 및 장치
JP2007028602A (ja) 2005-07-15 2007-02-01 Sanyo Electric Co Ltd 無線装置
JP2007074689A (ja) 2005-09-06 2007-03-22 Tokyo Institute Of Technology 高効率パイロット信号を用いたｏｆｄｍ送受信機
US20070147226A1 (en) 2005-10-27 2007-06-28 Aamod Khandekar Method and apparatus for achieving flexible bandwidth using variable guard bands
US7729447B2 (en) 2005-12-22 2010-06-01 Samsung Electronics Co., Ltd. Interleaver design with multiple encoders for more than two transmit antennas in high throughput WLAN communication systems
US20070153760A1 (en) 2005-12-29 2007-07-05 Nir Shapira Method, apparatus and system of spatial division multiple access communication in a wireless local area network
EP1804452B1 (en) 2006-01-03 2011-05-11 Alcatel Lucent Scheduling of control channels in multicarrier transmission systems
US8451808B2 (en) 2006-02-18 2013-05-28 Intel Corporation Techniques for 40 megahertz (MHz) channel switching
RU2400935C2 (ru) 2006-04-25 2010-09-27 Интердиджитал Текнолоджи Корпорейшн Работа канала высокой пропускной способности в ячеистой беспроводной локальной сети
US8509323B2 (en) 2006-08-22 2013-08-13 Motorola Mobility Llc Resource allocation including a DC sub-carrier in a wireless communication system
KR100961744B1 (ko) 2007-02-05 2010-06-07 삼성전자주식회사 광대역 무선통신시스템에서 상향링크 스케줄링 장치 및방법
CN101136894B (zh) 2007-03-23 2012-11-28 中兴通讯股份有限公司 可扩展的ofdm及ofdma带宽分配的方法和系统
US7746822B2 (en) 2007-03-29 2010-06-29 Intel Corporation Dynamic multi-access relaying for wireless networks
US8223857B2 (en) 2008-02-17 2012-07-17 Lg Electronics Inc. Method of communication using frame
US8503283B2 (en) 2008-06-12 2013-08-06 Nokia Corporation Channel access protocol for wireless communication
US8331310B2 (en) 2008-08-22 2012-12-11 Qualcomm Incorporated Systems and methods employing multiple input multiple output (MIMO) techniques
US8160166B2 (en) 2008-10-01 2012-04-17 Harris Corporation Orthogonal frequency division multiplexing (OFDM) communications device and method that incorporates low PAPR preamble with circuit for measuring frequency response of the communications channel
TWI366346B (en) 2008-11-04 2012-06-11 Ralink Technology Corp Method for reading and writing a block interleaver and the reading circuit thereof
KR101289944B1 (ko) 2008-12-12 2013-07-26 엘지전자 주식회사 초고처리율 무선랜 시스템에서 채널 추정 방법 및 이를 위한 장치
US8831541B2 (en) 2008-12-18 2014-09-09 Qualcomm Incorporated Multiple antenna wireless telecommunication method and system
JP5359254B2 (ja) 2008-12-19 2013-12-04 富士通株式会社 送信電力制御情報設定方法
US8989106B2 (en) 2009-02-27 2015-03-24 Qualcomm Incorporated Methods and apparatuses for scheduling uplink request spatial division multiple access (RSDMA) messages in an SDMA capable wireless LAN
EP2811717B1 (en) * 2009-04-13 2016-08-03 Marvell World Trade Ltd. Physical layer frame format for wlan
WO2010137845A2 (ko) 2009-05-25 2010-12-02 엘지전자 주식회사 무선 통신 시스템에서 단말의 파라메터를 조정하는 방법 및 장치
WO2010138921A2 (en) 2009-05-29 2010-12-02 Zte U.S.A., Inc. Signal transmission with fixed subcarrier spacing within ofdma communication systems
US8184566B2 (en) 2009-06-05 2012-05-22 Mediatek Inc. Systems for wireless local area network (WLAN) transmission and for coexistence of WLAN and another type of wireless transmission and methods thereof
US8526351B2 (en) 2009-06-05 2013-09-03 Broadcom Corporation Channel characterization and training within multiple user, multiple access, and/or MIMO wireless communications
US9137815B2 (en) * 2009-06-17 2015-09-15 Qualcomm Incorporated Multi-user multiple input multiple output wireless communications
KR101087286B1 (ko) 2009-07-15 2011-11-29 서울대학교산학협력단 무선랜 가상화 시스템
US8917784B2 (en) 2009-07-17 2014-12-23 Qualcomm Incorporated Method and apparatus for constructing very high throughput long training field sequences
CN104702376B (zh) 2009-07-29 2018-04-13 马维尔国际贸易有限公司 用于wlan发送的方法和装置
US20110038441A1 (en) 2009-08-12 2011-02-17 Cambridge Silicon Radio Limited Transmission mode detection
AU2010287291B2 (en) 2009-08-26 2013-12-19 Lg Electronics Inc. Method and apparatus for multiple frame transmission for supporting MU-MIMO
US8457079B2 (en) 2009-10-05 2013-06-04 Motorola Mobility Llc Method and apparatus for mitigating downlink control channel interference
US9055576B2 (en) 2009-10-08 2015-06-09 Qualcomm Incorporated Uplink resource allocation for LTE advanced
KR20110044938A (ko) 2009-10-25 2011-05-03 엘지전자 주식회사 Ｓａ-프리앰블을 전송하는 방법 및 기지국과, 상기 ｓａ-프리앰블 수신하는 방법 및 사용자기기
WO2011068387A2 (ko) 2009-12-03 2011-06-09 엘지전자 주식회사 무선랜 시스템에서의 프레임 전송방법 및 장치
US8238316B2 (en) * 2009-12-22 2012-08-07 Intel Corporation 802.11 very high throughput preamble signaling field with legacy compatibility
KR20120113769A (ko) 2010-01-08 2012-10-15 샤프 가부시키가이샤 사운딩 참조 신호 송신에 대한 이동체 통신 방법 및 시스템, 및 기지국, 유저 기기 및 이들에 탑재되는 집적 회로
KR101758909B1 (ko) 2010-02-18 2017-07-18 엘지전자 주식회사 무선 랜에서 수신 확인 전송 방법 및 장치
GB2478140A (en) 2010-02-25 2011-08-31 Sony Corp Selective local data insertion using hierarchical modulation symbols on OFDM sub-carriers in DVB-NGH system
US9794032B2 (en) * 2010-03-05 2017-10-17 Lg Electronics Inc. PPDU receiving method and apparatus based on the MIMO technique in a WLAN system
US8559323B2 (en) 2010-03-10 2013-10-15 Cisco Technology, Inc. Downlink OFDMA for service sets with mixed client types
US8982758B2 (en) 2010-03-29 2015-03-17 Intel Corporation Techniques for efficient acknowledgement for UL MU MIMO and uplink OFDMA in wireless networks
US8873582B2 (en) * 2010-04-08 2014-10-28 Lg Electronics Inc. Method for transmitting PPDU in wireless local area network and apparatus for the same
TWI552635B (zh) 2010-04-13 2016-10-01 內數位專利控股公司 在無線區域網路中群傳輸
WO2011136518A2 (en) 2010-04-26 2011-11-03 Samsung Electronics Co., Ltd. Method and apparatus for controlling inter-cell interference of control channels in ofdm-based hierarchical cellular system
US8306010B2 (en) * 2010-04-28 2012-11-06 Intel Corporation Systems and methods for uplink multi-user multiple input multiple output (MU MIMO) medium access and error recovery
US9060359B2 (en) * 2010-05-26 2015-06-16 Lg Electronics Inc. Method and apparatus for transceiving data in a wireless LAN system
US8718169B2 (en) 2010-06-15 2014-05-06 Qualcomm Incorporated Using a field format on a communication device
WO2012002705A2 (en) 2010-06-29 2012-01-05 Lg Electronics Inc. Method and apparatus for transmitting data frame in wlan system
WO2012003355A1 (en) 2010-07-01 2012-01-05 Marvell World Trade Ltd. Modulation of signal field in a wlan frame header
TWI511436B (zh) 2010-08-02 2015-12-01 Intersil Inc 多相非反相升降壓電壓轉換器與其之操作和控制方法
US9173110B2 (en) 2010-10-28 2015-10-27 Lg Electronics Inc. Method and apparatus for measuring a channel status between terminals in a wireless access system that supports cooperative communication
KR101099345B1 (ko) 2010-12-01 2011-12-26 엘지전자 주식회사 무선랜 시스템에서 채널 사운딩 방법 및 장치
US8761136B2 (en) 2010-12-21 2014-06-24 Mediatek Inc. Method for eliminating interference in a receiver, and associated apparatus
KR102036296B1 (ko) 2011-02-04 2019-10-24 마벨 월드 트레이드 리미티드 Wlan용 제어 모드 phy
EP2674002B1 (en) 2011-02-08 2018-06-06 Marvell World Trade Ltd. Wlan channel allocation
US20120269142A1 (en) * 2011-04-24 2012-10-25 Broadcom Corporation Doppler adaptation using pilot patterns within single user, multiple user, multiple access, and/or MIMO wireless communications
US9385911B2 (en) 2011-05-13 2016-07-05 Sameer Vermani Systems and methods for wireless communication of packets having a plurality of formats
US8891435B2 (en) 2011-06-15 2014-11-18 Marvell World Trade Ltd. Low bandwidth PHY for WLAN
TWI583211B (zh) 2011-08-12 2017-05-11 內數位專利控股公司 無線系統中彈性頻寬操作
KR102195872B1 (ko) 2011-10-13 2020-12-28 한국전자통신연구원 통신 시스템에서 데이터 송수신 장치 및 방법
WO2013055117A2 (ko) 2011-10-14 2013-04-18 엘지전자 주식회사 무선랜 시스템에서 상향링크 신호를 처리하는 방법 및 장치
WO2013058512A1 (ko) 2011-10-17 2013-04-25 엘지전자 주식회사 무선랜 시스템에서 프레임을 전송하는 방법 및 장치
JP5882485B2 (ja) 2011-11-23 2016-03-09 エルジー エレクトロニクス インコーポレイティド 無線ｌａｎシステムにおけるサービス区間スケジューリングに基づくデータ送受信方法及びそれをサポートする装置
US9451542B2 (en) * 2011-12-11 2016-09-20 Lg Electronics Inc. Method and device for transmitting and receiving frame using short guard interval
US9088504B2 (en) 2012-01-06 2015-07-21 Qualcomm Incorporated Systems and methods for wireless communication of long data units
JP6122039B2 (ja) 2012-03-01 2017-04-26 インターデイジタル パテント ホールディングス インコーポレイテッド Ｗｌａｎシステムにおけるマルチユーザ並列チャネルアクセス
WO2013130998A1 (en) * 2012-03-02 2013-09-06 Interdigital Patent Holdings, Inc. Method and system for providing beacon information
SG11201405541WA (en) 2012-03-06 2014-10-30 Interdigital Patent Holdings Supporting a large number of devices in wireless communications
WO2013141672A1 (ko) * 2012-03-23 2013-09-26 엘지전자 주식회사 상향링크 신호 전송 방법 및 스테이션 장치와, 상향링크 신호 수신 방법 및 액세스 포인트 장치
US9100984B2 (en) 2012-04-04 2015-08-04 Qualcomm Incorporated Wireless channelization
EP3425839B1 (en) * 2012-04-30 2024-05-01 InterDigital Patent Holdings, Inc. Method and apparatus for supporting coordinated orthogonal block-based resource allocation (cobra) operations
CN107579761A (zh) 2012-05-09 2018-01-12 交互数字专利控股公司 在无线接入点中实施的方法及无线接入点
US20130301563A1 (en) 2012-05-11 2013-11-14 Samsung Electronics Co., Ltd Pilot design for millimeter wave broadband
US20140003415A1 (en) 2012-07-02 2014-01-02 Qualcomm Incorporated Systems and methods for enhanced wireless communication frames
WO2014066785A1 (en) 2012-10-26 2014-05-01 Interdigital Patent Holdings, Inc. Uniform wlan multi-ap physical layer methods
CN103796250B (zh) * 2012-10-31 2018-06-12 中兴通讯股份有限公司 确定回传网络中wlan业务qos的方法和系统
US20140211775A1 (en) 2013-01-28 2014-07-31 Qualcomm Incorporated Larger delay spread support for wifi bands
US9419752B2 (en) * 2013-03-15 2016-08-16 Samsung Electronics Co., Ltd. Transmission opportunity operation of uplink multi-user multiple-input-multiple-output communication in wireless networks
US10439773B2 (en) 2013-04-15 2019-10-08 Qualcomm Incorporated Systems and methods for backwards-compatible preamble formats for multiple access wireless communication
US9467379B2 (en) * 2013-08-28 2016-10-11 Qualcomm Incorporated Methods and apparatus for multiple user uplink
US9648620B2 (en) 2013-08-28 2017-05-09 Qualcomm Incorporated Tone allocation for multiple access wireless networks
US20150117428A1 (en) 2013-10-28 2015-04-30 Electronics And Telecommunications Research Institute Multi-mode wireless transmission method and apparatus
EP3017641B1 (en) 2013-11-12 2019-10-02 Huawei Technologies Co., Ltd. System and method for high efficiency wireless local area network communications
US9544914B2 (en) 2013-11-19 2017-01-10 Intel IP Corporation Master station and method for HEW communication using a transmission signaling structure for a HEW signal field
US9325463B2 (en) 2013-11-19 2016-04-26 Intel IP Corporation High-efficiency WLAN (HEW) master station and methods to increase information bits for HEW communication
BR112016008419A8 (pt) 2013-11-19 2022-10-04 Intel Ip Corp Método, aparelho, e meio legível por computador para escalonamento de múltiplos usuários em redes de área local sem fios
WO2015076917A1 (en) 2013-11-19 2015-05-28 Li Guoqing C Master station and method for hew communication with signal field configuration for hew ofdma mu-mimo wideband channel operation
US9271241B2 (en) 2013-11-19 2016-02-23 Intel IP Corporation Access point and methods for distinguishing HEW physical layer packets with backwards compatibility
WO2015077068A1 (en) 2013-11-19 2015-05-28 Intel IP Corporation Transmit time offset in uplink multi-user multiple input-multiple output system
WO2015130335A1 (en) 2014-02-25 2015-09-03 Intel IP Corporation Uplink or downlink mu-mimo apparatus and method
TWI572160B (zh) 2014-02-25 2017-02-21 英特爾Ｉｐ公司 上行鏈路或下行鏈路之多使用者多輸入多輸出（ｍｕ－ｍｉｍｏ）的設備與方法
US20160344531A1 (en) 2014-02-25 2016-11-24 Intel IP Corporation Systems and methods for frequency multiplexing mu-mimo
TWI578838B (zh) 2014-04-01 2017-04-11 英特爾Ｉｐ公司 用於具有額外子載波的高效能（ｈｅ）通訊之無線設備
TWI586120B (zh) 2014-04-01 2017-06-01 英特爾Ｉｐ公司 用於以針對高效能無線網域（ｈｅｗ）正交分頻多重存取（ｏｆｄｍａ）多使用者多輸入多輸出（ｍｕ－ｍｉｍｏ）寬頻帶通道操作之信號欄組態的ｈｅｗ通訊之主站及方法
US9680603B2 (en) 2014-04-08 2017-06-13 Intel IP Corporation High-efficiency (HE) communication station and method for communicating longer duration OFDM symbols within 40 MHz and 80 MHz bandwidth
US20150327121A1 (en) 2014-05-08 2015-11-12 Guoqing C. Li Method, apparatus, and computer readable media for acknowledgement in wireless networks

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100091673A1 (en) * 2008-10-14 2010-04-15 Sony Corporation Wireless communication apparatus and wireless communication, and computer program
US20100107042A1 (en) * 2008-10-28 2010-04-29 Sony Corporation Wireless communication apparatus, wireless communication method, and computer program
US20110096685A1 (en) * 2009-10-26 2011-04-28 Electronics And Telecommunications Research Institute Packet mode auto-detection in multi-mode wireless communication system, signal field transmission for the packet mode auto-detection, and gain control based on the packet mode
US20110116401A1 (en) * 2009-11-13 2011-05-19 Raja Banerjea Multi-Channel Wireless Communications
US20110206156A1 (en) * 2010-02-23 2011-08-25 Electronics And Telecommunications Research Institute Method and apparatus for transmitting/receiving data in wireless communication system

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9867210B2 (en) 2013-11-19 2018-01-09 Intel IP Corporation Master station and method for HEW communication using a transmission signaling structure for a HEW signal field
US9882695B2 (en) 2013-11-19 2018-01-30 Intel IP Corporation Master station and method for HEW communication using a transmission signaling structure for a HEW signal field
US9450725B2 (en) 2013-11-19 2016-09-20 Intel IP Corporation Wireless apparatus for high-efficiency (HE) communication with additional subcarriers
US9544914B2 (en) 2013-11-19 2017-01-10 Intel IP Corporation Master station and method for HEW communication using a transmission signaling structure for a HEW signal field
US9615291B2 (en) 2013-11-19 2017-04-04 Intel IP Corporation High-efficiency station (STA) and method for decoding an HE-PPDU
US10348469B2 (en) 2013-11-19 2019-07-09 Intel IP Corporation Hew master station and method for communicating in accordance with a scheduled OFDMA technique on secondary channels
US10177888B2 (en) 2013-11-19 2019-01-08 Intel IP Corporation Wireless apparatus for high-efficiency (HE) communication with additional subcarriers
US10368368B2 (en) 2013-11-19 2019-07-30 Intel IP Corporation Method, apparatus, and computer readable medium for multi-user scheduling in wireless local-area networks
US9961678B2 (en) 2013-11-19 2018-05-01 Intel IP Corporation Master station and method for HEW communication with signal field configuration for HEW OFDMA MU-MIMO wideband channel operation
US9838961B2 (en) 2013-11-19 2017-12-05 Intel IP Corporation Communication station and method for communicating using minimum bandwidth units of various tone allocations for OFDMA HEW
US9900906B2 (en) 2013-11-19 2018-02-20 Intel IP Corporation Method, apparatus, and computer readable medium for multi-user scheduling in wireless local-area networks
US20150312907A1 (en) * 2014-04-28 2015-10-29 Newracom, Inc. Method for transmitting frame and method for detecting transmission mode
US9716606B2 (en) * 2014-04-28 2017-07-25 Newracom, Inc. Method for transmitting frame and method for detecting transmission mode
US12388498B2 (en) 2014-05-08 2025-08-12 AX Wireless, LLC Method, apparatus, and computer readable media for acknowledgement in wireless networks
US10355755B2 (en) 2014-06-27 2019-07-16 Techflux, Ltd. Method and device for transmitting data unit
US9685999B2 (en) 2014-06-27 2017-06-20 Techflux, Ltd. Method and device for transmitting data unit
US9967877B2 (en) * 2015-02-17 2018-05-08 Newracom, Inc. Method and apparatus for frame exchange in a high efficiency wireless LAN
US20180227913A1 (en) * 2015-02-17 2018-08-09 Newracom, Inc. Method and apparatus for frame exchange in a high efficiency wireless lan
US10743309B2 (en) * 2015-02-17 2020-08-11 Newracom, Inc. Method and apparatus for frame exchange in a high efficiency wireless LAN
US20160242177A1 (en) * 2015-02-17 2016-08-18 Newracom, Inc. Method and apparatus for frame exchange in a high efficiency wireless lan
US11153418B2 (en) 2018-11-15 2021-10-19 Nxp B.V. Wireless vehicular communications with dynamic-based relationships
US11240814B2 (en) 2019-03-13 2022-02-01 Nxp B.V. Wireless vehicular communications with channel allocation involving different protocols
US11867827B2 (en) 2019-05-03 2024-01-09 Nxp B.V. Radar sensing
US11778667B2 (en) 2020-06-05 2023-10-03 Nxp B.V. Mitigating interference in channel access involving multiple systems
US20230247082A1 (en) * 2022-02-02 2023-08-03 Servicenow, Inc. System and method for deferring data retrieval
US11856048B2 (en) * 2022-02-02 2023-12-26 Servicenow, Inc. System and method for deferring data retrieval

Also Published As

Publication number Publication date
US9462504B2 (en) 2016-10-04
CN105379217B (zh) 2019-06-04
EP3072270A4 (en) 2017-08-16
US20150139090A1 (en) 2015-05-21
CN105379217A (zh) 2016-03-02
BR112016008411A8 (pt) 2022-10-04
US9615291B2 (en) 2017-04-04
EP3072270A1 (en) 2016-09-28
US20160112899A1 (en) 2016-04-21
WO2015077056A1 (en) 2015-05-28
BR112016008411A2 (enrdf_load_stackoverflow) 2017-08-01
US20150139205A1 (en) 2015-05-21

Similar Documents

Publication Publication Date Title
US9271241B2 (en) Access point and methods for distinguishing HEW physical layer packets with backwards compatibility
US9668258B2 (en) Master station and method for high-efficiency WI-FI (hew) communication using multi-device hew preamble
US10348469B2 (en) Hew master station and method for communicating in accordance with a scheduled OFDMA technique on secondary channels
US10165470B2 (en) High-efficiency (HE) station and method for configuring HE packets with long and short preamble formats
US10122510B2 (en) Method, apparatus, and computer readable medium for signaling high efficiency packet formats using a legacy portion of the preamble in wireless local-area networks
KR102701377B1 (ko) 고효율 무선 근거리 통신망에서의 롱 트레이닝 필드의 정렬을 위한 장치, 컴퓨터 판독가능 매체 및 방법
US9699727B2 (en) Method, apparatus, and computer readable medium for signaling high efficiency preambles
US20170222769A1 (en) Apparatus, method, and computer readable medium for transmitting a high-efficiency wireless local-area network signal field for small and large bandwidth allocations
US20170208153A1 (en) Wireless device, method, and computer readable media for a high efficiency signal-a field in a high efficiency wireless local-area network
US20160242205A1 (en) Hew station and method for ul mu-mimo hew with improved receiver performance
US9602319B2 (en) Apparatus, method, and computer readable medium for high-efficiency wireless local-area network (HEW) signal field detection
BR122016015358A2 (pt) ponto de acesso e métodos para distinguir pacotes de camada física hew com compatibilidade com versões anteriores

Legal Events

Date Code Title Description
AS Assignment

Owner name: INTEL IP CORPORATION, CALIFORNIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KENNEY, THOMAS J;PERAHIA, ELDAD;AZIZI, SHAHRNAZ;SIGNING DATES FROM 20140610 TO 20140612;REEL/FRAME:033129/0670

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

STCF Information on status: patent grant

Free format text: PATENTED CASE

FEPP Fee payment procedure

Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

LAPS Lapse for failure to pay maintenance fees

Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20200223

AS Assignment

Owner name: INTEL CORPORATION, CALIFORNIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:INTEL IP CORPORATION;REEL/FRAME:056323/0278

Effective date: 20210512