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Wireless communication method, base station and, wireless communication system

  • US 20070195736A1
  • Filed: 08/23/2006
  • Published: 08/23/2007
  • Est. Priority Date: 02/23/2006
  • Status: Active Grant
First Claim
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1. A wireless communication method in which a radiation pattern is specified for each channel in a time-division manner for communication between a base station and a wireless terminal, comprising the steps of:

  • in a first slot that includes a common pilot channel transmitted to the wireless terminal in an omnidirectional manner or in a directional manner corresponding to a sector, an individual pilot channel transmitted with a specific beam pattern among a plurality of beam patterns, and a data channel for transmitting data to the wireless terminal with the beam pattern, the base station performing control, including synchronization, using the common pilot channel of the first slot and transmitting a pilot signal with a radiation pattern including the beam pattern in the direction in which the wireless terminal is located, using the individual pilot channel of the first slot;

    the wireless terminal, located in the direction, receiving the pilot signal and determining a data rate according to the reception quality of the pilot signal;

    the wireless terminal transmitting to the base station a signal for requesting the determined data rate;

    the base station receiving the signal and, based on the requested data rate, transmitting data to the wireless terminal with the radiation pattern, which includes the beam pattern in the same direction as the direction in which the pilot signal was transmitted, using a data channel of a second slot which is a predetermined number of slots after the first slot.

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