Control method for adaptive modulation circuit and wireless transmission device provided with adaptive modulation circuit
AssigneeNEC Corporation
InventorKaichiro Saito
Life of this patent
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Abstract
In a wireless transmission device provided with an adaptive modulation circuit and a control method for the adaptive modulation circuit, an Ethernet signal received from a wired transmission path is transmitted to an opposite station one-to-one via a wireless transmission path and the Ethernet signal in the opposite station is again output to the wired transmission path. A traffic-statistics circuit which accumulates a traffic volume of a time zone-specific Ethernet signal as statistical data is provided. A wireless transmission capacity can be reduced by decreasing a multi-level number of a modulation scheme in a time zone in which the traffic volume is small based on the accumulated statistical data.
Claims5
A wireless transmission device which transmits an Ethernet signal received from a wired transmission path to an opposite station one-to-one via a wireless transmission path and again outputs the Ethernet signal in the opposite station to the wired transmission path, comprising:
- a traffic-statistics circuit which accumulates a traffic volume of a time zone-specific Ethernet signal as statistical data, and
- an adaptive modulation circuit which suppresses a wireless transmission capacity by decreasing a multi-level number of a modulation scheme in a time zone in which the traffic volume is small based on the statistical data accumulated in the traffic-statistics circuit.
A wireless transmission device which transmits an Ethernet signal received from a wired transmission path to an opposite station one-to-one via a wireless transmission path and again outputs the Ethernet signal in the opposite station to the wired transmission path, comprising:
- a traffic-statistics circuit which accumulates a traffic volume of a time zone-specific Ethernet signal as statistical data and generates statistical traffic volume information by calculating a mode value of traffic volume information of the same time zone based on the traffic volume information accumulated in a predetermined fixed period;
- and
- an adaptive modulation circuit which suppresses wireless transmission power corresponding to a received electric field margin of the wireless transmission path generated by decreasing a multi-level number of a modulation scheme in a range in which fixed line quality is securable.
A wireless transmission device which transmits an Ethernet signal received from a wired transmission path to an opposite station one-to-one via a wireless transmission path and again outputs the Ethernet signal in the opposite station to the wired transmission path, comprising:
- a traffic-statistics circuit which accumulates a traffic volume of a time zone-specific Ethernet signal as statistical data and generates statistical traffic volume information by calculating a mode value of traffic volume information of the same time zone based on the traffic volume information accumulated in a predetermined fixed period;
- and
- an adaptive modulation circuit which reduces a wireless transmission capacity by decreasing a multi-level number of a modulation scheme in a time zone in which the traffic volume is small based on the statistical data accumulated in the traffic-statistics circuit and suppresses wireless transmission power corresponding to a received electric field margin of the wireless transmission path generated by decreasing the multi-level number of the modulation scheme in a range in which fixed line quality is securable.
A control method for an adaptive modulation circuit which transmits an Ethernet signal received from a wired transmission path to an opposite station one-to-one via a wireless transmission path and again outputs the Ethernet signal in the opposite station to the wired transmission path, comprising:
- accumulating a traffic volume of a time zone-specific Ethernet signal as statistical data;
- reducing a wireless transmission capacity by decreasing a multi-level number of a modulation scheme in a time zone in which the traffic volume is small based on the statistical data;
- and
- suppressing wireless transmission power corresponding to a received electric field margin of a wireless transmission path generated by decreasing the multi-level number of the modulation scheme in a range in which fixed line quality is securable.
Dependencies are inferred from the claim text.