Abstract: In Spatial Division Multiple Access (SDMA) communications, mobile devices that are transmitting to a base substantially simultaneously during a predetermined communications phase may wait until after an end of the predetermined communications phase to receive acknowledgments to their transmissions, so that a mobile device making a relatively short transmission does not experience an acknowledgement timeout while another mobile device is still completing a relatively long transmission. In some embodiments, the mobile devices may transmit a non-immediate block acknowledgement request during the communications phase.

Abstract: A wireless local area network (WLAN) device transmits multiple data packets within a data burst. In various embodiments, after the first packet is transmitted, subsequent packets are transmitted before expiration of an Interframe Space (IFS). The subsequent packets may have a full-length preamble, a partial preamble or no preamble at all.

Abstract: Methods and systems for communicating in a wireless network may distinguish different types of packet structures by modifying the phase of a modulation constellation, such as a binary phase shift keying (BPSK) constellation, in a signal field. Receiving devices may identify the type of packet structure associated with a transmission or whether the signal field is present by the phase of the modulation constellation used for mapping for the signal field. In one embodiment, the phase of the modulation constellation may be determined by examining the energy of the I and Q components after Fast Fourier Transform. Various specific embodiments and variations are also disclosed.

Abstract: Various embodiments are described to adaptively use a transmit opportunity. A wireless system comprising a memory and a processor is described. The processor is coupled to the memory. In one embodiment, the processor allocates a first portion of a transmit opportunity for an initial data burst and the processor allocates a second portion of the transmit opportunity for other operations including retries.

Abstract: Methods and systems for communicating in a wireless network may distinguish different types of packet structures by modifying the phase of a modulation constellation, such as a binary phase shift keying (BPSK) constellation, in a signal field. Receiving devices may identify the type of packet structure associated with a transmission or whether the signal field is present by the phase of the modulation constellation used for mapping for the signal field. In one embodiment, the phase of the modulation constellation may be determined by examining the energy of the I and Q components after Fast Fourier Transform. Various specific embodiments and variations are also disclosed.

Abstract: A wireless local area network (WLAN) device transmits a header over an air interface, at a first modulation rate. The header may include an indication of a second modulation rate that will be used to transmit a consolidated payload. In one embodiment, the header includes information that enables a receiver to determine when an end of each of the multiple data units will occur. The device farther transmits the consolidated payload at the second modulation rate. The consolidated payload includes multiple data units. In one embodiment, the consolidated payload includes information that enables the receiver to determine when an end of each of the multiple data units will occur.

Abstract: An apparatus and a system, as well as a method and article, may operate to select a group of contiguous communications channels having a specified number of channels, a center channel, and a control channel. Some embodiments may operate to select a group of contiguous communications channels having a specified control channel and a signed extension channel offset.

Abstract: In a wireless network, a wireless device may dynamically estimate how long it can remain in a sleep mode without missing out on a necessary opportunities to communicate within the network. In some embodiments, this estimate may be based on a combination of things such as the amount of data still queued up for transmission, recent history on data rates, a prediction on how long it will take another device (e.g., an access point) to accumulate enough data for another transmission, and/or how long the queued-up data can wait before it becomes stale.

Abstract: A system, apparatus, method and article to select data rates for a wireless communication system are described. An apparatus may include a media access control processor to monitor interference levels for a receiver, estimate throughput values for each interference level, and select a data rate based on the throughput values. Other embodiments are described and claimed.

Abstract: A high-throughput communication station conveys additional signaling information by transmitting a high-throughput packet with a time offset between some portions of the packet transmitted on a first subchannel and some portions of the packet transmitted on a second subchannel. The time offset may convey additional signaling information to a receiving station.

Abstract: Various embodiments are described for a trained data transmission for communication systems.

Abstract: In a spatial division multiple access system that employs acknowledgements to variable length transmissions within a timeout period, a station that has completed its transmission may delay beginning the timeout period until it determines that other stations on the same channel have completed their transmissions.

Abstract: In Spatial Division Multiple Access (SDMA) communications, mobile devices that are transmitting to a base substantially simultaneously during a predetermined communications phase may wait until after an end of the predetermined communications phase to receive acknowledgments to their transmissions, so that a mobile device making a relatively short transmission does not experience an acknowledgement timeout while another mobile device is still completing a relatively long transmission. In some embodiments, the mobile devices may transmit a non-immediate block acknowledgement request during the communications phase.

Abstract: In a high throughput wireless network, data is permitted to be transmitted in a reverse direction during a frame exchange (i.e., from a responder to an initiator). In at least one embodiment, channel training is performed in the reverse direction only if it is determined that a performance benefit may result.

Abstract: A frame format provides for wideband wireless local area network communications and informs narrower-band communication units when the channels are occupied by wider-band communication units. In some embodiments, the frame format includes a channelization field identifying channels that are used for communicating subsequent wideband fields of a packet, and a wideband-header field communicated on the identified channels. The wideband-header field may identify sub-fields that may be present in the wideband-header field, and may identify the presence of a wideband-data field. A long-compatibility field may be present that provides protection at the MAC level. The long-compatibility field may transport MAC frames that may include medium-reservation information compatible with narrower-band communication units.

Abstract: In a wireless network in which a central network device (e.g., an access point) communicates with multiple generations of mobile wireless devices that are backward compatible but not forward compatible, each generation of device may be selectively put into a mode that permits contending for the medium or a mode that does not permit contenting for the medium, through the use of packets that are formatted to be recognizable by some generations but not all generations.

Abstract: Various embodiments are described for a trained data transmission for communication systems.

Abstract: An adaptation technique is selected for use in a wireless network based on estimated throughput. In at least one embodiment, throughput is estimated for a wireless channel for both prefix adaptation and postfix adaptation. An adaptation technique is then selected based on the estimates. In some embodiments, an adaptation validity duration is determined to gauge the potential effectiveness of adaptation information associated with a wireless channel.

Abstract: A frame format provides for wideband wireless local area network communications and informs narrower-band communication units when the channels are occupied by wider-band communication units. In some embodiments, the frame format includes a channelization field identifying channels that are used for communicating subsequent wideband fields of a packet, and a wideband-header field communicated on the identified channels. The wideband-header field may identify sub-fields that may be present in the wideband-header field, and may identify the presence of a wideband-data field. A long-compatibility field may be present that provides protection at the MAC level. The long-compatibility field may transport MAC frames that may include medium-reservation information compatible with narrower-band communication units.

Abstract: A frame structure for communicating over a high-throughput communication channel includes a channelization field as part of a current data unit to indicate a frequency and space configuration of subsequent portions of the current data unit.