Adaptive link quality management for wireless medium
First Claim
1. A network node for metro area networking comprising:
- a first wireless interface configured for coupling to a second network node; and
a link quality management unit coupled to the first wireless interface and having a transmission power control unit; and
a first transmission parameter control unit.
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Accused Products
Abstract
To provide the quality and reliability of a fiber optic link over a wireless link, network nodes in accordance with the present invention include a link quality management unit, which controls multiple transmission parameters of a wireless interface in response variable link conditions. For example, the link quality management unit of one embodiment of the present invention controls transmission power, modulation, and error correction. In general, a receiving network node provides feedback to a transmitting network node. Thus, in many embodiments of the present invention, the link quality management unit includes a signal quality detector, which measures a signal quality value, such as bit error rate, signal to noise ratio, or error vector magnitude. The measured signal quality is transmitted back to the transmitting node so that appropriate changes can be made to the transmission parameters.
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Citations
65 Claims
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1. A network node for metro area networking comprising:
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a first wireless interface configured for coupling to a second network node; and
a link quality management unit coupled to the first wireless interface and having a transmission power control unit; and
a first transmission parameter control unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 59, 60, 61, 62, 63, 64, 65)
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28. A network node for metro area networking using time division multiplexing, the network node comprising:
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a first wireless interface configured for coupling to a second network node; and
a link quality management unit coupled to the first wireless interface, wherein the link quality management unit is configured to increase the bandwidth of the first wireless interface when a signal quality value is greater than a signal quality threshold; and
to decrease the bandwidth of the first wireless interface when the signal link quality value is less than the signal quality threshold.
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47. A method of controlling a wireless link between a transmitting network node and a receiving network node, the method comprising:
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measuring a first signal quality value at the receiving network node;
measuring a second signal quality value at the receiving network node;
providing the first signal quality value and the second signal quality value to the transmitting network node adapting a first transmission parameter to improve the signal quality value; and
adapting a transmission power level to improve the second signal quality value.
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58. A system for controlling a wireless link between a transmitting network node and a receiving network node, the method comprising:
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means for measuring a firs t signal quality value at the receiving network node;
means for measuring a second signal quality value at the receiving network node;
means for providing the first signal quality value and the second signal quality value to the transmitting network node means for adapting a first transmission parameter to improve the signal quality value; and
means for adapting a transmission power level to improve the second signal quality value.
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Specification