Abstract: The present disclosure relates to the concept of preempting PPDUs, i.e., truncating a PPDU carrying non-latency sensitive traffic to serve STAs with latency constraints. A first communication device comprises circuitry configured to listen to an ongoing data exchange between a second communication device and a third communication device on a wireless channel, to estimate a reception duration of a data unit, to determine if the transmission of the data unit is truncated and/or if a truncation condition is met, the reception duration indicating the time of reception of the data unit by the third communication device if the data unit were not truncated, and, if the transmission of the data unit is truncated and/or if a truncation condition is met, receive a preemptive data unit from the second communication device or transmit a preemptive data unit to the second communication device.

Abstract: There is provided a transmission device comprising circuitry configured to generate a physical layer (PHY) service data unit (PSDU) including at least two PSDU parts; generate a physical layer (PHY) protocol data unit (PPDU) from said PSDU including modulating the PSDU into a plurality of OFDM symbols included in the PPDU, wherein a first PSDU part of said PSDU corresponding to a first number of OFDM symbols is subjected to a different PHY operation than a second PSDU part of said PSDU corresponding to a second number of OFDM symbols; and transmit said PPDU to at least two receiving devices. Further provided are a corresponding receiving device and corresponding methods.

Abstract: Multiple access points (APs) that transmit jointly at the same time to one or more stations (STAs) need logically to be connected via a link, e.g. a backhaul link. The master AP creates physical layer input data units (PSDUs) to be transmitted during joint transmission and conveys it via the link to one or more slave APs. It may happen that a STA receives the PSDU or parts of it erroneously, in which case a retransmission takes place. A mechanism that allows to reuse the PSDU, which was conveyed by the master AP via the link to the slave AP for the initial transmission, for any subsequent retransmission. Thereby, the bandwidth requirement of the backhaul link is significantly lowered when retransmissions take place. In particular, the difficulty that the PSDU contents change within a retransmission is addressed.

Abstract: A first communication device comprises circuitry configured to simultaneously communicate with a group of two or more second communication devices. The circuitry is configured to generate schedule information that schedules, for two or more subsequent time slots, the assignment of different resource units to the second communication devices of the group of second communication devices to indicate, per time slot or per group of time slots, which second communication device of the group shall use which resource unit for data transmission, transmit the schedule information to the group of second communication devices, and receive data in subsequent time slots from second communication devices of the group that use the resource units according to the assignment scheduled by the schedule information for data transmission.

Abstract: The present disclosure relates to the concept of preempting PPDUs, i.e., truncating a PPDU carrying non-latency sensitive traffic to serve STAs with latency constraints. A first communication device comprises circuitry configured to receive a truncation notification during an ongoing exchange of data units with a second communication device, the truncation notification indicating that the ongoing transmission of a data unit shall be truncated and a preemptive data unit shall be received from and/or transmitted to the third communication device, terminate the ongoing transmission of the data unit before the estimated transmission time of the data unit, and receive from and/or transmit to the third communication device the preemptive data unit within the remaining duration of the truncated data unit or within the remaining duration of the transmit opportunity, established between the first and the second communication devices for the ongoing data unit exchange.

Abstract: A first communication device that is configured to communicate with a second communication device having circuitry configured to obtain user data length information indicating the length of one or more data units of user data to be transmitted to the second communication device; obtain at least two transmission parameter sets each including transmission parameters for use in the transmission of the user data, the at least two transmission parameter sets having one or more different parameter values; determine, from the user data length information and the at least two transmission parameter sets, encoding parameters that are identical regardless which transmission parameter set is used for transmission of the user data; encode the user data into transmission data units according to the determined encoding parameters; and modulate and transmit the transmission data units to the second communication device according to one of the transmission parameter sets.

Abstract: This disclosure relates to the concept of preempting TXOPs, i.e. suspending a data exchange between communication devices during an ongoing TXOP to serve STAs with latency constraints. According to an embodiment a first communication device is provided that is configured to communicate with a second communication device.

Abstract: A communication device is configured to communicate with a second communication device, the communication device comprising circuitry configured to transmit one or more data frames to the second communication device that require a response by the second communication device, listen to a first response acknowledging receipt of at least one of the one or more data frames from the second communication device, and, if a first response is not received, change transmit opportunity configuration and/or channel access for non-data frames and/or data frames.

Abstract: A first communication device is configured to communicate with a second communication device, the first communication device comprising circuitry configured to receive data units, a received data unit comprising an information part and at least a portion of a parity part of a codeword comprising said information part and said parity part, from the second communication device; provide an indication to the second communication device indicating at least one erroneous data unit that failed to be received or decoded by the first communication device: receive a retransmission of the erroneous data unit having an identical information part as the corresponding originally transmitted data unit: accumulate log-likelihood ratios (LLRs) of the erroneous data unit and the corresponding retransmission of the erroneous data unit; and decode the data unit based on the accumulated LLRs.

Abstract: A first communication device that is configured to transmit data to a second communication device comprises circuitry configured to generate a second number of mutually orthogonal sequences; generate a third number of one or more spatial streams, each spatial stream carrying payload data; generate a fourth number of transmission training sequences, each comprising, in addition to a distinct orthogonal sequence of said mutually orthogonal sequences, one or more zeros and/or a subset of said distinct orthogonal sequence; generate a training field by mapping the transmission training sequences into a first number of training symbols, each training symbol spanning a plurality of tones; and arrange the training field before and/or between the payload of the spatial streams to enable channel estimation by the second communication device.

Abstract: First communication device configured to simultaneously exchange data units via at least two links with one or more other communication devices including a second communication device that is configured to simultaneously exchange data units via at least two links with at least one or more third communication devices, the first communication device comprising circuitry configured to reserve, if second data units are expected to be queued at the second communication device at an expected arrival time, two links for data exchange once first data units are queued at the first communication device or once third data units are queued at the second or third communication device.

Abstract: The present disclosure presents an efficient backhaul operation that minimizes data rate requirements of the backhaul. Backhaul information is transmitted from a master AP to one or more slave APs for joint transmission from the one or more slave APs to an STA in coordination with a transmission from the master AP to the STA.

Abstract: A transmission apparatus for use in a communication system comprises MAC layer processing circuitry and PHY layer processing circuitry. The MAC layer processing circuitry is configured to encode, on a MAC layer, N data units, each comprising payload data, into M parity units, each comprising parity data allowing the reconstruction of one or more erroneous data units among said N data units in a receiver apparatus, according to a parity rule, the N data units and the corresponding M parity units representing a parity block, and to form a MAC layer data stream from the data units and the parity units of the parity block. The PHY layer processing circuitry is configured to encode, on a PHY layer, bits of the MAC layer data stream into codewords of a code and to form a PHY layer data stream from the codewords.

Abstract: A communication device, e.g. an access point, for RF-based communication with another communication device, e.g. a station, comprises antenna circuitry configured to transmit and receive RF signals and beamforming circuitry configured to perform beamforming. The beamforming circuitry controls the antenna circuitry to transmit data, in a beacon transmission phase prior to the beamforming training phase, using a set of third directive transmit beams in subsequent time slots and to listen, in the beamforming training phase, using a set of first directive receive beams in subsequent time slots that is different from the set of third directive transmit beams.

Abstract: A first communication device that is configured to transmit data to a second communication device comprises circuitry configured to generate a second number of mutually orthogonal sequences; generate a third number of one or more spatial streams, each spatial stream carrying pay load data; generate a fourth number of transmission training sequences, each comprising, in addition to a distinct orthogonal sequence of said mutually orthogonal sequences, one or more zeros and/or a subset of said distinct orthogonal sequence; generate a training field by mapping the transmission training sequences into a first number of training symbols, each training symbol spanning a plurality of tones; and arrange the training field before and/or between the payload of the spatial streams to enable channel estimation by the second communication device.

Abstract: A first communication device comprising circuitry configured to exchange data with one or more second communication devices on a first communication channel, and transmit collision information on a second communication channel that is a different channel than the first communication channel, wherein the circuitry is configured to transmit the collision information if there is a collision on the first communication channel or if the first communication channel is occupied by data transmission of a second communication device, the collision information indicating that there is a collision on the first communication channel or that the first communication channel is occupied.

Abstract: The present technology relates to a communication device, a communication terminal, and a communication method that enable efficient sharing of data for cooperative transmission. A communication device divides shared data to be shared with another communication device for each information type in the shared data in order to perform cooperative transmission to a communication terminal, and generates a data unit less than or equal to a maximum transmission unit in a transmission path. The present technology can be applied to a wireless communication system.

Abstract: A first communication device that is configured to transmit data to a second communication device comprises circuitry configured to generate a second number of mutually orthogonal sequences; generate a third number of one or more spatial streams, each spatial stream carrying payload data; split each of a first number of training symbols into a fourth number of tone sets, each training symbol spanning a plurality of tones; split each orthogonal sequence elements of the corresponding portion of the orthogonal sequences onto the tone sets of the training symbols; and arrange the training field before and/or between the payload data of the spatial streams to enable channel estimation by the second communication device.

Abstract: A first communication device operating as source node sends a collaborative transmission (CT) link metric query to relay nodes which solicits the relay nodes to feedback measured/estimated values of several collaborative transmission data rate. At least one second communication device operating as relay node thus sends a CT link metric response to the source node. The CT link metric response includes measured/estimated values of several collaborative transmission data rate among relay nodes and sink nodes (non-AP STAs).

Abstract: A first communication device that is configured to transmit data to a second communication device comprises circuitry configured to generate a second number of mutually orthogonal sequences; generate a third number of one or more spatial streams, each spatial stream carrying payload data; split each of a first number of training symbols into a fourth number of tone sets, each training symbol spanning a plurality of tones; split each orthogonal sequence elements of the corresponding portion of the orthogonal sequences onto the tone sets of the training symbols; and arrange the training field before and/or between the payload data of the spatial streams to enable channel estimation by the second communication device.