Wireless communication systems employing communication schemes
AssigneeKYOCERA Corporation
InventorTakeo Miyata
Life of this patent
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Abstract
A terminal speed identification unit identifies the moving speed of a wireless terminal currently in communication. A ranging control unit sets the transmission cycle of a ranging signal of a wireless terminal moving at a speed greater than or equal to a predetermined speed shorter than the transmission cycle of a ranging signal of a wireless terminal moving at a speed below the predetermined speed. A transmission unit transmits a signal notifying the transmission cycle of a ranging signal to the wireless terminal. A reception unit receives a ranging signal from a wireless terminal currently in communication.
Claims2
A wireless base station communicating with a plurality of wireless terminals by an Orthogonal Frequency-Division Multiplexing (OFDM) scheme or Orthogonal Frequency-Division Multiple Access (OFDMA) scheme, comprising:
- an identification unit at the wireless base station that allows the wireless base station to calculate a moving speed of a wireless terminal currently in communication,
- a ranging control unit setting a transmission cycle of a ranging signal of a wireless terminal moving at a speed greater than or equal to a predetermined speed shorter than the transmission cycle of a ranging signal of a wireless terminal moving at a speed below said predetermined speed so that an amount of frames for a ranging cycle for the terminal moving at a speed greater than or equal to a predetermine speed is reduced relative to an amount of frames for a ranging cycle of a ranging signal of a wireless terminal moving at a speed below said predetermined speed,
- a transmission unit transmitting a signal notifying said set ranging signal transmission cycle to said wireless terminal, and
- a reception unit receiving a ranging signal from a wireless terminal currently in communication.
A wireless base station system including a plurality of wireless base stations and a control station controlling said plurality of wireless base stations, communicating with a plurality of wireless terminals by an Orthogonal Frequency-Division Multiplexing (OFDM) scheme or Orthogonal Frequency-Division Multiple Access (OFDMA) scheme, said system comprising:
- an identification unit at the wireless base station that allows the wireless base station to calculate a moving speed of a wireless terminal currently in communication with any wireless base station,
- a ranging control unit setting a transmission cycle of a ranging signal of a wireless terminal moving at a speed greater than or equal to a predetermined speed shorter than the transmission cycle of a ranging signal of a wireless terminal moving at a speed below said predetermined speed so that an amount of frames for a ranging cycle for the terminal moving at a speed greater than or equal to a predetermined speed is reduced relative to an amount of frames for a ranging cycle of a ranging signal of a wireless terminal moving at a speed below said predetermined speed,
- a transmission unit transmitting to said wireless terminal a signal notifying said set ranging signal transmission cycle, and
- a reception unit receiving a ranging signal from a wireless terminal currently in communication,
- said identification unit arranged at said control station,
- said transmission unit and reception unit arranged at said wireless base station, and
- said ranging control unit arranged at either said control station or any of said each of wireless base stations.
Dependencies are inferred from the claim text.