Wireless communication system, wireless communication device, and method

A wireless terminal that configures en equally distributed network having no base station, comprising:

• a space division multiplexing (SDM) transmitting unit that includes an array antennas including a plurality of antennas and generates a plurality of directional radio signals to be transmitted to other terminals within the network, each of the directional radio signals being obtained by superimposing a plurality of radio signals at the antennas, each of the radio signals at the antennas being composed of modulated data for each of the other terminals;
• a single-system receiving unit;
• a time division multiple access (TDMA) control unit that controls a transmission operation of the SDM transmitting unit and a reception operation of the receiving unit in a time division manner;
• a terminal direction measuring unit that periodically measures directions of the other terminals within the network;
• and
• an antenna directivity control unit that controls a transmission operation of the PPM transmitting unit such that directivity of each of the directional radio signals matches the direction of each of the other terminals,
• wherein the antenna directivity control unit includes:
• an adjustment parameter reference table that stores therein adjustment parameters respectively corresponding to directions;
• and
• an adjustment parameter setting table that manages the adjustment parameters in association with terminal IDs, and
• the SDM transmitting unit executes a transmission operation of the directional radio signals using the adjustment parameters associated with the terminal IDs.

A method executed by a computer of operating a wireless communication device that configures an equally distributed network having no base station, the method comprising:

• simultaneously transmitting, by the wireless communication device, a plurality of directional radio signals each obtained by superimposing a plurality of radio signals at antennas, each of which is composed of modulated data for each of other wireless communication devices, to the other wireless communication devices within the network according to a space division multiplexing scheme;
• receiving radio signals transmitted from the other wireless communication devices within the network by a single-system receiving unit of the wireless communication device;
• controlling, by the wireless communication device, an operation of transmitting the directional radio signal and an operation of receiving the radio signal in a time division manner;
• periodically measuring, by the wireless communication device, directions of the other wireless communication devices within the network;
• acquiring, by the wireless communication device, adjustment parameters respectively corresponding to the measured directions of the other wireless communication devices with reference to an adjustment parameter reference table storing therein adjusting parameters respectively corresponding to directions;
• and
• generating, by the wireless communication device, the directional radio signals to be transmitted to the other wireless communication devices using the adjustment parameters.