Adaptive link quality management for wireless medium

A network node for metro area networking comprising:

• a first wireless interface configured for coupling to a second network node;
• a link quality management unit coupled to the first wireless interface and having a transmission power control unit;
• a first transmission parameter control unit;
• wherein first transmission parameter control unit is a modulation control unit configured to control the modulation rate of the first wireless interface;
• and
• wherein the modulation control unit uses quadrature amplitude modulation.

A network node for metro area networking comprising:

• a first wireless interface configured for coupling to a second network node;
• a link quality management unit coupled to the first wireless interface and having a transmission power control unit;
• a first transmission parameter control unit;
• wherein the first transmission parameter control unit comprises:
• (a) an error correction unit configured to generate error correction code for the first wireless interface;
• and
• (b) an ECC level control unit coupled to control a level of redundancy in the error correction unit;
• and
• wherein the error correction unit comprises:
• (a) a first ECC encoder;
• and
• (b) a second ECC encoder coupled to the first ECC encoder.

A network node for metro area networking using time division multiplexing, the network node comprising:

• a first wireless interface configured for coupling to a second network node;
• 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;
• wherein the link quality management unit comprises a modulation control unit configured to control the modulation rate of the first wireless interface;
• wherein the modulation control unit is coupled to receive the signal quality value from the second network node;
• and
• wherein the modulation control unit adjusts the modulation of the first wireless interface based on the signal quality ratio.

A network node for metro area networking using time division multiplexing, the network node comprising:

• a first wireless interface configured for coupling to a second network node;
• 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;
• wherein the link quality management unit comprises:
• (a) an error correction unit configured to generate error correction code for the first wireless interface;
• and
• (b) an ECC level control unit coupled to control a level of redundancy in the error correction unit;
• and
• wherein the error correction unit comprises:
• (a) a first ECC encoder;
• and
• (b) a second ECC encoder coupled to the first ECC encoder.

A method of controlling a wireless link between a transmitting network node and a receiving network node, the method comprising:

• 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;
• wherein the second signal quality value is a received power level;
• and
• wherein the measuring a second signal quality value at the receiving network node, further comprises:
• comparing the received power level with a threshold value;
• and generating a received power error value as the first signal quality value.

A system for controlling a wireless link between a transmitting network node and a receiving network node, the method comprising:

• means for measuring a first 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;
• means for adapting a transmission power level to improve the second signal quality value;
• wherein the second signal quality value is a received power level;
• and
• wherein the means for measuring a second signal quality value at the receiving network node, further comprises:
• (a) means for comparing the received power level with a threshold value;
• and
• (b) means for generating a received power error value as the first signal quality value.

A system for controlling a wireless link between a transmitting network node and a receiving network node, the method comprising:

• means for measuring a first 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;
• means for adapting a transmission power level to improve the second signal quality value;
• wherein the first transmission parameter is a modulation level;
• and
• wherein the means for adapting a first transmission parameter to improve the signal quality value, further comprises means for decreasing the modulation level when the signal quality value is less than a desired signal quality value.