Abstract: In a wireless communication network, specific portions of the communication may combine directional transmission with omnidirectional reception. In particular, sector-level directional transmission may be established through sector sweeps, followed by antenna training for more directionality. In some embodiments, collisions during the exchange may be reduced by having different network devices use different sub-channels or different time slots. In some embodiments, each network may restrict its network communications to a single sub-channel that is different than the sub-channels used by adjacent networks.

Abstract: Some embodiments of the invention pertain to a memory system containing multiple memory devices, in which one or multiple ones of the memory devices may flexibly be selected at one time for a common operation to be performed by all the selected devices concurrently.

Abstract: Various embodiments of the invention may use bitmaps to communicate channel quality index (CQI) information for multiple sub-channels in an orthogonal frequency division multiple access (OFDMA) wireless communications network. A base station may use bitmaps to report on whether the CQI information for each sub-channel has been under-reported or over-reported. A mobile station may use bitmaps to consolidate CQI information for multiple sub-channels into a single CQI set of parameters.

Abstract: In a radio frequency identification (RFID) system that requires an RFID reader to receive a response from an RFID tag and then transmit a command to the RFID tag within a certain time period, the RFID reader may place an initial part of the command transmission in the RFID reader's transmit chain before receiving the entire response from the RFID tag, and complete the command transmission after receiving the entire response.

Abstract: Embodiments of apparatuses, articles, methods, and systems for fast transitioning resource negotiation in wireless networks are generally described herein. Other embodiments may be described and claimed.

Abstract: An apparatus and a system, as well as a method and article, may operate to reserve access to one or more overlapping channels having a resource allocation (e.g., a frequency range) overlapping a resource allocation of at least two overlapped channels by reserving access to the overlapped channels. Reservation of the overlapped channels may occur in a substantially simultaneous, serial, or semi-serial fashion.

Abstract: Various embodiments of the invention may take advantage of persistent scheduling in a wireless network to achieve efficiencies of operation. One embodiment dynamically adjusts the duration of persistent scheduling based on changing channel conditions. When mobile stations are grouped together for persistent scheduling, another embodiment uses a bitmap to indicate which mobile stations in the group have data in the current frame. Still another embodiment eliminates the Connection Identifier from a packet header when bitmaps are being used.

Abstract: A dynamic cache policy manager for a mass memory may be used to decide whether a data request is to be routed to the cache or directly to the mass memory, based on estimated delays in processing the request. The choice may be based, at least partially, on the size of the respectively queues for the cache and mass memory. For write requests, the choice may be based on how many erase blocks are available in the cache.

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 wireless network communications device, transmit power levels may be interactively adjusted to dynamically maintain a desired level of network loading and/or data throughput within the network in a changing network environment.

Abstract: Cooperative scheduling of master and slave base station transmissions is disclosed. Silent and deaf intervals are scheduled in a frame format of a first network to allow transmissions to occur in a second network without interference.

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: Based on an expected error rate for a wireless transmission, the length of the transmission may be limited so that the probability of an error in one or more particular data segments is no greater than a predetermined threshold value. The expected error rate and/or the threshold value may be periodically changed, based on various criteria.

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: Various embodiments of the invention may include an antenna for a wireless device, the antenna operable to store electrical energy received from a power source. The stored electrical energy may then be used to power the circuitry of the device. Storing electrical power in this manner may allow the device to temporarily continue operating when the incoming harvested energy becomes too weak to instantaneously provide all the power needed to continue operating the device. In some embodiments the wireless device is a radio frequency identification (RFID) tag.

Abstract: Briefly, in accordance with an embodiment of the invention, an apparatus and method to provide authentication and secure communication is provided. In one example, the method may include transmitting machine credentials of a first device, wherein the machine credentials are used to authenticate the first device so that the first device is able to communicate with a second device after the first device transitions from a first power state to a second power state in response to a command received by the first device from another device, wherein power consumption of the first device in the first power state is less than the power consumption of the first device in the second power state. The first device may be used in either a wired or wireless network.

Abstract: Some embodiments of the invention may incorporate an oscillator circuit into a radio frequency identification (RFID) tag in which the oscillator circuit comprises at least one component that is sensitive to an environmental factor such as temperature or humidity. When the tag responds to an RFID reader, the tag may incorporate the sense environmental parameter into its response by transmitting an oscillating signal whose frequency indicates the value of the parameter. The RFID reader may then determine the parameter by analyzing the resulting analog portion of the waveform in terms of frequency and/or cycle and/or pulse width. In some embodiments, the environmental sensor may be incorporated into the integrated circuit containing the RFID tag circuit.

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: In a multi-channel analog-to-digital converter (ADC), in which the ADC sequentially converts analog values that are input from different analog sensors, separate sample-and-hold circuits may be used to read all the analog values at the same time, and the ADC may then sequentially convert the values from each sample-and-hold circuit. This approach allows a single ADC to be used in time-critical applications that require all the analog sensor values to be measured at the same time.

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.