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: Techniques and structures are provided to support a short-NAV type wireless medium reservation scheme in a network that utilizes adaptive modulation techniques.

Abstract: In a communications packet directed to multiple addresses and having a directory of the addresses in order of transmission, a device receiving the packet may use the directory to help determine when the last frame in which the device has an interest is received, and then enter a low power mode for the remainder of the packet reception. The device constructing the packet for transmission may arrange the frames in a manner that promotes overall power savings in the group of addressed devices.

Abstract: A multicarrier receiver changes receive capabilities based on a current channel utilization. The number of antennas used to receive multicarrier communication signals may be changed or the channel bandwidth may be changed.

Abstract: An initiator device in a high throughput wireless network is able to communicate with multiple responder devices during a wireless frame exchange. In at least one embodiment of the invention, the initiator may transmit a frame that includes offset and duration related information for each of multiple responders. The offset and duration related information for each responder identifies a transmit time period during which that responder may respond to the initiator.

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: In a wireless network, the decision of when and whether to send unsolicited polls to a particular mobile wireless device may be made by monitoring communications conditions affecting the ability of the particular device to gain channel access, and sending unsolicited polls if the ability to gain channel access is below a threshold value. Such conditions may include one or more of channel load, device transmission load, collision rate, and number of mobile wireless devices contending for access.

Abstract: Methods and systems for communicating in a wireless network negotiate a level of service for a data stream between peers of the wireless network. The level of service may be modified based on one or more characteristics of a communication link or the wireless network such as channel load, channel free time, physical (PHY) link rate, data rate and/or overall channel capacity. Various specific embodiments and variations are also disclosed.

Abstract: Briefly, in accordance with one embodiment of the invention, an access point may provide multiple access to a single medium by providing time division multiple access to the medium.

Abstract: Apparatus and systems, as well as methods and articles, may operate to transmit, within a mixed-generation network including a legacy device, at least one packet to the legacy device, wherein the at least one packet includes a modified duration parameter.

Abstract: Briefly, a method and apparatus to acknowledge multicast transmission by a station. The station may transmit acknowledgement signal over a dedicated frequency sub-channel which may be allocated by an access point.

Abstract: According to various aspects, methods for multicasting in wireless networks may include one or more client devices sending requests for delivery of application data packets to a network access station. The requests may include a multicast address and QoS attributes. The network access station may create a multicast schedule which coordinates the multicast deliver with power saving protocols of the client device so that the client devices will be awake when the multicast occurs. The client devices may also instigate removal of a multicast schedule when the application data packets are received or no longer needed by sending schedule deletion requests to the access station. When a deletion requests is received from the last client device associate with a multicast schedule, the schedule may be removed. Additional embodiments and implementations are also disclosed.

Abstract: In a wireless network, transmit power levels may be interactively adjusted to dynamically maintain a desired level of network loading and/or data throughput in a changing network environment.

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: Bi-directional communications using a single channel access in a wireless local area network reduces overhead associated with accessing the channel.

Abstract: A base station may organize poll groups into groups having similar predicted durations of subsequent responses. In one embodiment predicted durations may be provided by the devices that are to be polled. In another embodiment the predicted durations may be based on past responses from the devices that are to be polled.

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: A source application executed within a source device may packetize and send source data over a link to a destination application executed within a destination device. In various embodiments, clock recovery processes are performed in conjunction with the destination application in order to synchronize the rates of source data production and consumption (e.g., playback). To facilitate the clock recovery process, a transport delay is calculated based on the difference between a source MAC-layer timestamp and a destination MAC-layer timestamp that envelop portions of the link that include variable delay elements. The transport delay is used by the clock recovery process to adjust a source application-layer timestamp, in one embodiment. In another embodiment, the transport delay is used by the destination device to impart a fixed cumulative transport delay on the source data before it is delivered to the destination application.

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.

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.