Abstract: A method for performing spatial sharing between an existing SP and a candidate SP includes transmitting a first measurement request to an STA involved in the candidate SP carrying measurement configuration information for measurement over primary tier 1 channel of a tier 2 channel. The measurement configuration information includes the method that is to be used for the requested measurement, the measurement start time, the measurement duration, the number of time blocks within the measurement duration, the number of concurrent measurements to be performed using plural RX antenna configurations, and the method for reporting results of plural concurrent measurements, wherein the duration of each time block is the same.

Abstract: A radio frequency heating system having a radio frequency amplifier supplying power to a radio frequency heating chamber and a matching network includes a controller monitoring forward and reflected power, phase and amplitude of the power supply to the heating chamber and adjusting the power supplied by the radio frequency amplifier and/or the impedance of the matching network in accordance with predetermined values of the reflected power, and/or phase and amplitude.

Abstract: A communication method of the present disclosure comprises transmitting a sounding frame comprising a training signal; and receiving a first feedback frame from a communication partner device, the first feedback frame comprising first beamforming feedback information, wherein the first feedback frame is transmitted together with at least one second feedback frame by multiuser transmission.

Abstract: A method for performing spatial sharing between an existing SP and a candidate SP includes transmitting a first measurement request to an STA involved in the candidate SP carrying measurement configuration information for measurement over primary tier 1 channel of a tier 2 channel. The measurement configuration information includes the method that is to be used for the requested measurement, the measurement start time, the measurement duration, the number of time blocks within the measurement duration, the number of concurrent measurements to be performed using plural RX antenna configurations, and the method for reporting results of plural concurrent measurements, wherein the duration of each time block is the same.

Abstract: A transmission apparatus comprises an assignment information generator which, in operation, assigns resources on a resource unit (RU) basis to one or more terminal stations (STAs) and generates assignment information that specifies RUs allocated to the one or more STAs; a transmission signal generator which, in operation, generates a transmission signal that includes a legacy preamble, a non-legacy preamble and a data field, wherein the non-legacy preamble comprises a first signal field and a second signal field that carry a set ID and the assignment information, and wherein the set ID identifies one assignment set comprising the one or more STAs and a plurality of assignment indices, and wherein the assignment information comprises a resource assignment indication for each of a plurality of assignment which are referenced by the plurality of assignment indices; and a transmitter which, in operation, transmits the generated transmission signal.

Abstract: A transmission apparatus includes a transmission signal generator which, in operation, generates a transmission signal having an aggregate physical layer protocol data unit (PPDU) that includes a legacy preamble, a legacy header, a non-legacy preamble, a plurality of non-legacy headers and a plurality of data fields; and a transmitter which, in operation, transmits the generated transmission signal, wherein the legacy preamble, the legacy header and the plurality of non-legacy headers are transmitted using a standard bandwidth, the non-legacy preamble and the plurality of data fields are transmitted using a variable bandwidth that is larger than the standard bandwidth and wherein a plurality of sets of each of the plurality of non-legacy headers and each of the plurality of data fields are transmitted sequentially in a time domain.

Abstract: A method of reducing interference between wireless networks operating on channels with different bandwidths is proposed. One wireless network operates on a narrow band channel while the other network operates on a wide band channel that overlaps the narrow band channel. The method involves communicating information regarding the wide band channel to the devices of the network operating on the narrow band channel. A device in the network operating on the wide band channel constructs a special frame that carries its network ID as well as information regarding the wide band channel that it is operating on, namely the center frequency and the channel bandwidth. The device then broadcasts this frame on the narrow band channel. In addition, this frame is protected from possible collision by preceding the transmission of the frame by protection frames on both the channels.

Abstract: There is provided a communication method for a coordinator communication device, including generating a first scheduling element to be used by a first communication device and a second scheduling element to be used by a second communication device; and transmitting the first and second scheduling elements to the first and second communication devices. The second scheduling element includes a second allocation indicating a time-frequency resource allocated to the second communication device. The first scheduling element includes a first allocation indicating a time-frequency resource allocated to the first communication device and optionally includes a first virtual allocation that is a duplicate of the second allocation.

Abstract: There is provided a wireless communication device that includes: a receiving unit that receives a first transmission frame via a receiving antenna, the first transmission frame being transmitted from a communication partner; a response-frame generating unit that generates a first response frame indicating reception of the first transmission frame, based on the first transmission frame received via the receiving antenna; a transmitting unit that transmits the generated first response frame via a transmitting antenna; a determining unit that determines whether or not the same first transmission frame is retransmitted from the communication partner; and an antenna control unit that changes a beam pattern of the transmitting antenna, when the same first transmission frame is retransmitted from the communication partner.

Abstract: There is provided a wireless communication device that includes: a receiving unit that receives a first transmission frame via a receiving antenna, the first transmission frame being transmitted from a communication partner; a response-frame generating unit that generates a first response frame indicating reception of the first transmission frame, based on the first transmission frame received via the receiving antenna; a transmitting unit that transmits the generated first response frame via a transmitting antenna; a determining unit that determines whether or not the same first transmission frame is retransmitted from the communication partner; and an antenna control unit that changes a beam pattern of the transmitting antenna, when the same first transmission frame is retransmitted from the communication partner.

Abstract: There is provided a wireless communication device that includes: a receiving unit that receives a first transmission frame via a receiving antenna, the first transmission frame being a MAC frame transmitted from a communication partner; a response-frame generating unit that generates a first response frame indicating reception of the first transmission frame, based on the first transmission frame received via the receiving antenna; a transmitting unit that transmits the generated first response frame via a transmitting antenna; a determining unit that determines whether or not the same first transmission frame is retransmitted from the communication partner; and an antenna control unit that changes a beam pattern of the transmitting antenna, when the same first transmission frame is retransmitted from the communication partner.

Abstract: A method for performing spatial sharing between an existing SP and a candidate SP includes transmitting a first measurement request to an STA involved in the candidate SP carrying measurement configuration information for measurement over primary tier 1 channel of a tier 2 channel. The measurement configuration information includes the method that is to be used for the requested measurement, the measurement start time, the measurement duration, the number of time blocks within the measurement duration, the number of concurrent measurements to be performed using plural RX antenna configurations, and the method for reporting results of plural concurrent measurements, wherein the duration of each time block is the same.

Abstract: An apparatus for automatically fixing sutures used in the surgical replacement of a heart valve, including a first cylinder having a first end and a second end and an interior surface and an exterior surface, and first means for securing fixing suture formed on the exterior surface adjacent to the second end of the first cylinder. The apparatus also includes a second cylinder having second means for securing fixing suture formed on an interior surface of the second cylinder, such that the second means corresponds to and fixedly engages the first means for securing fixing suture, and the first means and the second means secure fixing sutures therebetween.

Abstract: A method of reducing interference between wireless networks operating on channels with different bandwidths is proposed. One wireless network operates on a narrow band channel while the other network operates on a wide band channel that overlaps the narrow band channel. The method involves communicating information regarding the wide band channel to the devices of the network operating on the narrow band channel. A device in the network operating on the wide band channel constructs a special frame that carries its network ID as well as information regarding the wide band channel that it is operating on, namely the center frequency and the channel bandwidth. The device then broadcasts this frame on the narrow band channel. In addition, this frame is protected from possible collision by preceding the transmission of the frame by protection frames on both the channels.

Abstract: There is provided a wireless communication device that includes: a receiving unit that receives a first transmission frame via a receiving antenna, the first transmission frame being a MAC frame transmitted from a communication partner; a response-frame generating unit that generates a first response frame indicating reception of the first transmission frame, based on the first transmission frame received via the receiving antenna; a transmitting unit that transmits the generated first response frame via a transmitting antenna; a determining unit that determines whether or not the same first transmission frame is retransmitted from the communication partner, and an antenna control unit that changes a beam pattern of the transmitting antenna, when the same first transmission frame is retransmitted from the communication partner.

Abstract: A system for performing vascular surgery includes a first retractor blade and a second retractor blade and a fulcrum device. The first retractor blade includes a first grasping bar, and the second retractor blade comprises a second grasping bar. The first retractor blade and the second retractor blade are adapted to engage opposing edges of a subcostal incision in a patient. The fulcrum device includes a first fulcrum slot and a second fulcrum slot formed through opposing edges of the fulcrum device. The first fulcrum slot is adapted to receive the first grasping bar and the second fulcrum slot is adapted to receive the second grasping bar, such that the fulcrum device is adapted to apply leverage from the first retractor blade and the second retractor blade to spread the edges of the incision and to allow access to a chest cavity of the patient.

Abstract: In radio communication, especially in a centralized network, a commonly faced problem is the issue of the coexistence between a plurality of networks and different networks use different network timing parameters with no synchronization to one another. Thus, a device of one network usually has a difficulty in communication with a device of another network whether or not both are in a radio communication range. This results in causing unwanted mutual interference because when two or more networks operate in the same operation space, a device belonging to a certain network has a difficulty in letting a device belonging to another network know about the existence of the device belonging to the certain network.

Abstract: A method of wireless medium access for establishing a decentralized wireless network, the method comprising broadcasting of beacon frames by each of a plurality of devices; listening, at each device, for beacon frames of other devices; identifying, at each device, other devices who's beacon frames have been heard; and forming the decentralised wireless network as at least two dynamic networks, each dynamic network being centered around one of the devices and having said other devices who's beacon frames have been heard by said one device as network members.

Abstract: A distributed wireless medium access control protocol is disclosed. According to the disclosed wireless medium access control protocol the medium access time is partitioned into equal sized slots, and a predetermined number of the slots forming a superframe. The protocol defines beaconing devices and passive devices. Each beaconing device designates one of the slots in the superframe as its beacon medium access slot, and broadcasts during that beacon medium access slot a beacon frame to other devices in wireless range of that beaconing device. A beacon frame collision detection and resolution procedure, and a procedure for reserving access time for communication between devices are also disclosed.

Abstract: A system for performing vascular surgery includes a first retractor blade and a second retractor blade and a fulcrum device. The first retractor blade includes a first grasping bar, and the second retractor blade comprises a second grasping bar. The first retractor blade and the second retractor blade are adapted to engage opposing edges of a subcostal incision in a patient. The fulcrum device includes a first fulcrum slot and a second fulcrum slot formed through opposing edges of the fulcrum device. The first fulcrum slot is adapted to receive the first grasping bar and the second fulcrum slot is adapted to receive the second grasping bar, such that the fulcrum device is adapted to apply leverage from the first retractor blade and the second retractor blade to spread the edges of the incision and to allow access to a chest cavity of the patient.