Abstract:
Embodiments of a master station and method for communicating with a plurality of high-efficiency Wi-Fi (HEW) devices in a wireless network are generally described herein. In some embodiments, the master station may contend for a wireless medium during a contention period to receive control of the medium for an HEW control period, and transmit an HEW control and schedule transmission at the beginning of the HEW control period. The HEW control and schedule transmission may include a schedule indicating channel resources for communications with the HEW devices during the HEW control period in accordance with a non-contention based multiple access technique. The channel resources indicated in the HEW control and schedule transmission may comprise subspaces within a wideband legacy channel bandwidth. Transmissions on HEW channels during the HEW control period may have symbol times aligned within each legacy channel for legacy-device coexistence.
Abstract:
Embodiments of a high-efficiency (HE) communication station and method for HE communication in a wireless network are generally described herein. The HE communication station may communicate 4× longer-duration OFDM symbols on channel resources in accordance with an OFDMA technique. The channel resources may comprise one or more resource allocation units with each resource allocation unit having a predetermined number of data subcarriers. The station may also configure the resource allocation units in accordance with one of a plurality of subcarrier allocations for one of a plurality of interleaver configurations. The station may process the longer-duration OFDM symbols with a 512-point fast-Fourier Transform (FFT) for communication over a 40 MHz channel bandwidth comprising a 40 MHz resource allocation unit, and with a 1024-point FFT for communication over an 80 MHz channel bandwidth comprising either two 40 MHz resource allocation units or one 80 MHz resource allocation unit.
Abstract:
Methods and apparatus are disclosed for scheduling a narrowband uplink transmission from a wireless station to a wireless access point in response to a station-specific wideband downlink transmission from the access point to the station. A station-specific downlink frame includes a station identifier associated with the station, and further includes resource allocation information associated with an uplink transmission channel over which the station is to transmit an uplink frame. The station-specific downlink frame is transmitted from the access point to the station over a downlink transmission channel having an associated downlink bandwidth. Based on the resource allocation information, the access point receives the uplink frame from the station over the uplink transmission channel. The uplink transmission channel has an associated uplink bandwidth that is narrower than the downlink bandwidth of the downlink transmission channel. In some disclosed examples, the uplink transmission channel is a sub-channel of the downlink transmission channel.
Abstract:
Apparatuses, methods, and computer readable media are disclosed for location based advertising and querying for low power devices in a wireless local -area network. An apparatus is disclosed including memory and processing circuitry couple to the memory, where the processing circuitry is configured to: encode a location-based advertisement (LBA) frame comprising a first location identifier (LID) and a duration, configure the access point to transmit the LBA frame to a sensor hub with a second LID, where the first LID and the second LID match, and decode a feedback report from the sensor hub, where the feedback report is in response to the LBA frame. The feedback report may include measured data from one or more internet of things (IoT) devices, and some of the measured data may be collected from the IoT devices during the duration. An apparatus of a sensor hub is disclosed that includes a LID.
Abstract:
A high-efficiency wireless local-area network (HEW) device including transceiver circuitry and processing circuitry is disclosed. The transceiver circuitry and processing circuitry may be configured to encode or decode a packet using a low-density parity check (LDPC) code four times longer than a legacy LDPC code and in accordance with a channel code, and to transmit or receive the packet. The LDPC code may be four times longer than the legacy LDPC code. The LDPC may be 7776 bits and the legacy LDPC code may be 1944 bits. The packet may be transmitted or received in accordance with 1024 QAM. The channel code may be 1/2, 2/3, 3/4, or 5/6. The LDPC subcarrier mapping may have an increased distance between sub-carriers compared with a legacy Institute of Electrical and Electronic Engineers 802.11 standard.
Abstract:
In a wireless network, a user equipment (UE) can communicate with an Evolved Node B (eNodeB). During at least some times, the UE transmits a data stream to the eNodeB, over one of several available antenna states on the UE. The antenna states can include one or more tuning states for each antenna port on the UE. At predetermined times, which can be periodic, the UE ceases transmission of the data stream, transmits a test signal sequentially over each of its antenna states, receives a signal back from the eNodeB indicating which of the antenna states provides the strongest signal, and switches to the indicated antenna state. After switching, the UE can resume transmission of the data stream over the indicated antenna state. In some examples, the UE can repeat the antenna tuning/retuning process periodically.
Abstract:
Embodiments of a master station and method for communicating with a plurality of high-efficiency Wi-Fi (HEW) devices in a wireless network are generally described herein. In some embodiments, the master station may contend for a wireless medium during a contention period to receive control of the medium for an HEW control period, and transmit an HEW control and schedule transmission at the beginning of the HEW control period. The HEW control and schedule transmission may include a schedule indicating channel resources for communications with the HEW devices during the HEW control period in accordance with non-contention based multiple access technique. The channel resources indicated in the HEW control and schedule transmission may comprise subspaces within a wideband legacy channel bandwidth. Transmissions on HEW channels during the HEW control period may have symbol times aligned within each legacy channel for legacy-device coexistence.
Abstract:
A method for transmit time offset in a UL-MU-MIMO system monitors respective transmit powers, over a wireless channel, for a plurality of stations in the system. A respective transmit time offset is determined for each station in response to the respective transmit power of each station. A poll exchange sequence is initiated in which the transmit time offsets are transmitted to each respective station. An access point can then receive data from the stations at times adjusted by the respective transmit time offsets.
Abstract:
For example, an apparatus may include a segment parser to parse scrambled data bits of a PPDU into a first plurality of data bits and a second plurality of data bits, the PPDU to be transmitted in an OFDM transmission over an aggregated bandwidth comprising a first channel in a first frequency band and a second channel in a second frequency band; a first baseband processing block to encode and modulate the first plurality of data bits according to a first OFDM MCS for transmission over the first channel in the first frequency band; and a second baseband block to encode and modulate the second plurality of data bits according to a second OFDM MCS for transmission over the second channel in the second frequency band.
Abstract:
This disclosure describes systems, methods, and devices related to wake-up radio (WUR) advertisement channels. A device may include a wake-up receiver (WURx) and a primary connectivity radio. The device may determine a wake-up radio (WUR) discovery subchannel for WUR advertisement. The WUR discovery subchannel may be associated with a channel of a frequency band. The device may generate a WUR discovery frame comprising a WUR advertisement. The device may transmit, by the WURx, the WUR discovery frame to a second device using the WUR discovery subchannel. The device may identify a response from the second device indicating an acknowledgment of the WUR discovery frame.