Communication system, communication apparatus, and data transmission method
AssigneeCanon Kabushiki Kaisha
InventorDaisuke Horio
Life of this patent
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Abstract
More than one communication device that is to simultaneously transmit identical data through multiple data transmissions using different radio wave multiplex types is determined based on the link qualities of a plurality of communication devices. Then the multiple data transmissions are made by transmitting the identical data with synchronized timings at the determined communication apparatuses. The link qualities are determined by measuring received signal intensities, bit error rates, or frame error rates at the respective communication devices at the time of the multiple data transmissions using two radio wave multiplex types orthogonal to each other.
Claims14
A communication apparatus in a communication system comprised of a plurality of communication apparatuses, the communication apparatus comprising:
- a first determination unit configured to determine one or more first communication apparatuses within a shadow area of a second communication apparatus using a first radio wave multiplex type, wherein the shadow area is a low link quality area;
- a second determination unit configured to determine a third communication apparatus to transmit data to the one or more first communication apparatuses by data transmission using a second radio wave multiplex type different from the first radio wave multiplex type,
- wherein the second determination unit determines the third communication apparatus that has link qualities with the one or more first communication apparatuses being equal to or higher than a threshold, and
- wherein the second communication apparatus and the third communication apparatus concurrently transmit data using the first radio wave multiplex type and the second radio wave multiplex type, respectively;
- wherein the link qualities are based on a received signal intensity, a bit error rate, or a frame error rate detected at each communication apparatus when the multiple data transmissions have been performed using two different radio wave multiplex types orthogonal to each other.
A data transmitting method of a communication apparatus in a communication system comprised of a plurality of communication apparatuses, the method comprising:
- determining one or more first communication apparatuses within a shadow area of a second communication apparatus using a first radio wave multiplex type, wherein the shadow area is a low link quality area;
- determining a third communication apparatus to transmit data to the one or more first communication apparatuses by data transmission using a second radio wave multiplex type different from the first radio wave multiplex type,
- wherein the third communication apparatus is determined such that the third communication apparatus has link qualities with the one or more first communication apparatuses being equal to or higher than a threshold, and
- wherein the second communication apparatus and the third communication apparatus concurrently transmit data using the first radio wave multiplex type and the second radio wave multiplex type, respectively;
- wherein the link qualities are based on a received signal intensity, a bit error rate, or a frame error rate detected at each communication apparatus when the multiple data transmissions have been performed using two different radio wave multiplex types orthogonal to each other.
Dependencies are inferred from the claim text.