Adaptive radio resource management for wireless local area networks
First Claim
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1. A method for adaptive radio resource management in a wireless communication system, the system including an access point and at least one wireless transmit/receive unit (WTRU), the method comprising the steps of:
- examining a frame error rate value of a WTRU;
examining a channel utilization value of the WTRU;
examining a current data rate of the WTRU;
adjusting system parameters for the WTRU based on the examined variables, the adjusting step being performed by one of rate control, congestion control, and traffic shaping;
wherein rate control is performed if one of the following conditions is satisfied;
the channel utilization value is below a low channel utilization threshold and the current data rate is above a minimum data rate threshold; and
the frame error rate value is below a low frame error rate threshold, the channel utilization value is above a high channel utilization threshold, and the current data rate is below a maximum data rate threshold;
wherein congestion control is performed if the frame error rate value is above a low frame error rate threshold and the channel utilization value is above a high channel utilization threshold; and
wherein traffic shaping is performed if one of the following conditions is satisfied;
the frame error rate value is above a high frame error rate threshold and the channel utilization value is above a low channel utilization threshold; and
the frame error rate value is above a high frame error rate threshold, the channel utilization value is below a low channel utilization threshold; and
the current data rate is equal to a minimum data rate threshold.
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Abstract
In a wireless communication system including an access point and at least one wireless transmit/receive unit (WTRU), a method for adaptive radio resource management begins by examining a frame error rate value of a WTRU. Then, a channel utilization value of the WTRU and a current data rate of the WTRU are examined. System parameters for the WTRU are adjusted based on the examined variables.
29 Citations
11 Claims
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1. A method for adaptive radio resource management in a wireless communication system, the system including an access point and at least one wireless transmit/receive unit (WTRU), the method comprising the steps of:
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examining a frame error rate value of a WTRU; examining a channel utilization value of the WTRU; examining a current data rate of the WTRU; adjusting system parameters for the WTRU based on the examined variables, the adjusting step being performed by one of rate control, congestion control, and traffic shaping; wherein rate control is performed if one of the following conditions is satisfied; the channel utilization value is below a low channel utilization threshold and the current data rate is above a minimum data rate threshold; and the frame error rate value is below a low frame error rate threshold, the channel utilization value is above a high channel utilization threshold, and the current data rate is below a maximum data rate threshold; wherein congestion control is performed if the frame error rate value is above a low frame error rate threshold and the channel utilization value is above a high channel utilization threshold; and wherein traffic shaping is performed if one of the following conditions is satisfied; the frame error rate value is above a high frame error rate threshold and the channel utilization value is above a low channel utilization threshold; and the frame error rate value is above a high frame error rate threshold, the channel utilization value is below a low channel utilization threshold; and
the current data rate is equal to a minimum data rate threshold. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus for performing radio resource management (RRM) in a wireless communication system, comprising:
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a measurement device, for collecting measurements in the wireless communication system and for calculating one or more metrics based on the measurements; a RRM decision device, for evaluating each of the one or more metrics against a predetermined threshold; at least one RRM action device, selected from the group consisting of;
traffic shaping, rate control, and congestion control, each RRM action device being triggered by said RRM decision device;wherein said traffic shaping device is triggered if one of the following conditions is satisfied; a calculated frame error rate value is above a high frame error rate threshold and a calculated channel utilization value is above a low channel utilization threshold; and the calculated frame error rate value is above a high frame error rate threshold, the calculated channel utilization value is below a low channel utilization threshold; and
a calculated current data rate is equal to a minimum data rate threshold;wherein said rate control device is triggered if one of the following conditions is satisfied; the calculated channel utilization value is below a low channel utilization threshold and the calculated current data rate is above a minimum data rate threshold; and the calculated frame error rate value is below a low frame error rate threshold, the calculated channel utilization value is above a high channel utilization threshold, and the calculated current data rate is below a maximum data rate threshold; and wherein said congestion control device is triggered if the calculated frame error rate value is above a low frame error rate threshold and the calculated channel utilization value is above a high channel utilization threshold. - View Dependent Claims (7, 8)
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9. An integrated circuit for performing radio resource management (RRM) in a wireless communication system, comprising:
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a measurement device, for collecting measurements in the wireless communication system and for calculating one or more metrics based on the measurements; a RRM decision device, for evaluating each of the one or more metrics against a predetermined threshold; at least one RRM action device, selected from the group consisting of;
traffic shaping, rate control, and congestion control, each RRM action device being triggered by said RRM decision device;wherein said traffic shaping device is triggered if one of the following conditions is satisfied; a calculated frame error rate value is above a high frame error rate threshold and a calculated channel utilization value is above a low channel utilization threshold; and the calculated frame error rate value is above a high frame error rate threshold, the calculated channel utilization value is below a low channel utilization threshold; and
a calculated current data rate is equal to a minimum data rate threshold;wherein said rate control device is triggered if one of the following conditions is satisfied; the calculated channel utilization value is below a low channel utilization threshold and the calculated current data rate is above a minimum data rate threshold; and the calculated frame error rate value is below a low frame error rate threshold, the calculated channel utilization value is above a high channel utilization threshold, and the calculated current data rate is below a maximum data rate threshold; and wherein said congestion control device is triggered if the calculated frame error rate value is above a low frame error rate threshold and the calculated channel utilization value is above a high channel utilization threshold. - View Dependent Claims (10, 11)
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Specification