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Sendai city, Japan

Patent
NEC Communication Systems Ltd., Kansai University and Japan Advanced Telecommunications Research Institute International | Date: 2015-09-15

A transmitter generates a header frame having a frame length indicating the beginning of data to be transmitted, data frames having frame lengths representing the data to be transmitted, and an end frame having a frame length indicating the end of the data to be transmitted. Then, for all of the header frame, data frames and end frame, the transmitter executes transmitting the kth frame when the wireless communication space is available, thereby transmitting the header frame, data frames and end frame, one after another, in accordance with the CSMA/CA scheme.


Patent
Japan Advanced Telecommunications Research Institute International and NEC Communication Systems Ltd. | Date: 2013-03-04

A receiver has an ID that includes three signal detection intervals (S


Patent
NEC Communication Systems Ltd., Kansai University and Japan Advanced Telecommunications Research Institute International | Date: 2013-03-26

A wireless device (


Patent
Japan Advanced Telecommunications Research Institute International and NEC Communication Systems Ltd. | Date: 2013-03-18

A terminal device (


Patent
Nec Communication Systems Ltd. | Date: 2012-06-12

A wireless communication device includes a data transmission and reception section that wirelessly transmits a plurality of test packets; a signal sensing section that senses a power of a spatial radio wave signal on a frequency channel that is the same as the plurality of test packets and outputs sample data of the sensed spatial radio wave signal; a calculation processing section that converts the sample data into time series sample data; a collision detection section that calculates a packet collision rate based on the number of packet collisions and the number of the plurality of test packets if there is a packet collision due to interference of the plurality of test packets with another communication; and a control section that adjusts a parameter that the data transmission and reception section uses based on a calculation result of the collision detection section.

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