Abstract: A method, in a communication system utilizing channels for transmitting first PHY mode data units, includes generating first and second data units conforming to first and second PHY modes, respectively, causing the first data unit to be transmitted via a channel, determining a frequency band for transmitting the second data unit, and causing the second data unit to be transmitted via the frequency band. Generating the first and second data units includes generating first and second series of OFDM symbols, respectively. At least a portion of the second OFDM symbols includes more upper-edge than lower-edge guard tones, or vice versa. The frequency band has a bandwidth equal to the channel bandwidth divided by n?2, and either a lowest or highest sub-band of one or more channels is excluded from the frequency band when the second OFDM symbols include more upper-edge or more lower-edge guard tones, respectively.

Abstract: A method includes generating first and second preambles for first and second data units corresponding to first and second PHY modes, respectively. Generating the first preamble includes generating a first STF, LTF, and SIG field. The first SIG field includes an OFDM symbol modulated according to a first modulation technique. The OFDM symbol begins a first time interval, and ends a second time interval, after the first LTF begins. Generating the second preamble includes generating a second STF and LTF. The second STF has a greater duration, and different repeating sequence, than the first STF. The second LTF includes a second OFDM symbol modulated according to a second modulation technique, and at least partially occupying a location beginning a third time interval, and ending a fourth time interval, after the second LTF begins. The third and fourth time intervals are equal to the first and second time intervals, respectively.

Abstract: A preamble portion of a physical layer (PHY) data unit is generated for transmission via a long range communication protocol. A service field is generated with a length of eight or less bits. A data portion of the PHY data unit is generated to include the service field having the length of eight bits or less.

Abstract: The present specification describes techniques and apparatus that enable wireless devices to communicate effectively at short ranges. In one implementation, the transmit power of a transmitting device is reduced to permit a receiving device to demodulate a signal.

Abstract: After transitioning a network interface of a first wireless communication device from a low power state to an active state, transmitting a request for a second wireless communication device to transmit data for the first wireless communication device that is buffered at the second wireless communication device. An indication of whether there is data for the first wireless communication device buffered at second wireless communication device is received. When there is data for the first wireless communication device buffered at second wireless communication device, data for the first wireless communication device that was buffered at the second wireless communication device is received from the second wireless communication device.

Abstract: A network interface of an access point device is configured to transmit to one or more first client stations in a first basic service set (BSS) a first value of a first parameter that indicates a time duration during which the access point device will not dissociate a client station due to not receiving at least one frame from the client station, and transmit to one or more second client stations in a second BSS a second value of the first parameter. The first value of the first parameter is at least an order of magnitude larger than the second value of the first parameter.

Abstract: An indication that a network interface of a wireless communication device is in a low power state is received. Prior to receiving an indication that the network interface of the wireless communication device is no longer in the low power state, a data unit is received from the wireless communication device, wherein the data unit includes a request to transmit to the wireless communication device data for the wireless communication device that has been buffered while the wireless communication device is in the low power state. Responsive to the request, an indication of whether there is buffered data for the wireless communication device is transmitted. Additionally, when it is determined that there is buffered data for the wireless communication device, buffered data is transmitted to the wireless communication device.

Abstract: In a method available frequency band for communication is determined and a frequency fc of a carrier is determined based on the available frequency band. The carrier is set to the frequency fc for communicating with one or more communication devices via a first communication channel within the available frequency band using. After communicating via the first communication channel, the carrier frequency fc is used for communicating with one or more communication devices via a second communication channel within the available bandwidth. A center frequency of the first channel is different than a center frequency of the second channel.

Abstract: In a method for detecting a clock rate of a data unit, the data unit is received via a communication channel. The data unit includes i) a first preamble portion and ii) an orthogonal frequency division multiplexing (OFDM) portion following the first preamble portion. The OFDM portion includes a second preamble portion including one or more long training fields. Based on the first preamble portion, whether a clock rate of the OFDM portion is a first clock rate or a second clock rate lower than the first clock rate is determined based on the first preamble portion.

Abstract: In a method for generating a data unit for transmission via a communication channel, a first preamble portion of the data unit is generated based on whether a physical layer (PHY) mode is a first PHY mode or a second PHY mode. An OFDM portion of the data unit is generated. The OFDM portion follows the first preamble portion, includes a second preamble portion including one or more long training fields, is clocked at a first clock rate when the PHY mode is the first PHY mode, and is clocked at a second clock rate lower than the first clock rate when the PHY mode is the second PHY mode.

Abstract: In a method for generating a physical layer (PHY) data unit for transmission via a communication channel, information bits to be included in the PHY data unit are encoded using a forward error correction (FEC) encoder. The information bits are mapped to a constellation symbols. Additionally, either the information bits are encoded according to a block coding scheme, or the constellation symbols are encoded according to the block coding scheme. Orthogonal frequency division multiplexing (OFDM) symbols are generated to include the constellation symbols and the PHY data unit is generated to include the OFDM symbols.

Abstract: An available frequency band for communication is determined, and a subset of communication channels from possible communication channels within the available frequency band is determined based on the available frequency band. A communication channel is selected from the subset of communication channels, and the selected communication channel is utilized to communicate with one or more communication devices.

Abstract: A first preamble for a first data unit includes a first long training field and a first signal field modulated according to a first technique. The first data unit is generated according to a first data unit format and includes the first preamble. A second preamble, generated for a second data unit, includes a second signal field and a second long training field. Information in the second signal field is repeated and/or the second long training field is generated so that a duration of the second long training field is longer than a duration of the first long training field. A portion of the second signal field is modulated according to a second technique or a portion of the second long training field is modulated according to the second technique to signal to a receiver that the second data unit is formatted according to a second data unit format.

Abstract: In a method for generating a physical layer (PHY) data unit for transmission via a communication channel, a first preamble portion and a data portion of the data unit is generated. The first preamble portion includes one or more long training fields. The first preamble portion and the data portion are modulated using a plurality of orthogonal frequency division multiplexing (OFDM) symbols. Symbol duration of each OFDM symbol is at least 8 ?s. The data unit is generated to include the plurality of OFDM symbols.

Abstract: A network device includes a first communication module and a second communication module. The first communication module communicates with a first device using a first wireless communication standard. The first communication module receives data from the first device during a first time period and transmits data to the first device during a second time period. The second communication module communicates with a second device using a second wireless communication standard. The second communication module receives a block of packets from the second device during the first time period. The second communication module transmits an acknowledgement to the second device during the second time period when the block of the packets is received.

Abstract: Embodiments of the present invention provide a method that includes receiving, by a traffic arbiter, a predetermined time-slot allocation of one or more uplink time slots and/or one or more downlink time slots for a first wireless media access control (MAC) configured to operate within a first wireless transmission system. The method also includes determining, by the traffic arbiter, whether to grant a second wireless MAC, configured to operate within a second wireless transmission system, permission to transmit or receive based at least in part on the predetermined time-slot allocation.

Abstract: A network interface includes a radio frequency system and a media access controller. The media access controller includes first and second client modules and a control module. Each of the client modules wirelessly communicates with a network via the radio frequency system and the antenna. Each of the client modules is controllable to be in an active state or a sleep state. The control module determines priority levels of the first client module and the second client module. The control module also, based on the priority levels, (i) controls the first client module to be in the active state to permit communication between the first client module and the radio frequency system, and (ii) controls the second client module to be in the sleep state to prevent communication between the second client module and the radio frequency system.

Abstract: In a method for transmitting channel feedback data from a receiver to a transmitter, channel data for a plurality of orthogonal frequency division multiplexing (OFDM) tones for one or more spatial streams corresponding to a communication channel is determined. A plurality of angle values associated with the one or more spatial streams and one or more OFDM tones is determined. For each of the one or more spatial streams, a per-tone signal to noise ratio (PT-SNR) associated with one or more OFDM tones is determined, and an average signal to noise ratio (avg-SNR) is determined by averaging the signal to noise ratio (SNR) values. A feedback report is generated to include at least i) the plurality of angle values, ii) the PT-SNRs, and iii) the avg-SNR. The feedback report is included in a data unit to be transmitted from the receiver to the transmitter.

Abstract: In a method of determining a set of communication channels for a first basic service set from at least i) a first set of channels and ii) a second set of channels, wherein each of at least some of the channels in the second set of channels partially overlaps, in frequency, at least one of the channels in the first set of channels, whether the second set of channels is being utilized by a second basic service set is determined. That the set of communication channels for the first basic service set includes either i) the first set of channels or ii) the second set of channels is determined based at least on a determination of whether the second set of channels is being utilized by the second basic service set.

Abstract: In a method of determining an available channel bandwidth in a communication system, wherein the communication system utilizes i) a set of component channels for transmitting data streams and ii) a set of access control channels, and wherein each of at least some of the access control channels partially overlaps, in frequency, at least one of the component channels, whether a primary channel of the access control channels is idle is determined. The primary channel partially overlaps, in frequency, at least a first one of the component channels. That a composite channel includes one or more of the component channels is determined based at least on a determination of whether the primary channel is idle. A signal is caused to be transmitted via the composite channel after determining that the composite channel includes one or more of the component channels.