Optimizing quality of service in wireless networks
First Claim
1. A computer-implemented method in an access point for accessing a medium for data transmission in a wireless communication system, the method comprising the steps of:
- determining a QoS (quality of service) type for traffic received at the access point, wherein more than one type of traffic is determined;
separately queuing the traffic at the access point responsive to the QoS type of traffic for separate processing;
measuring an amount of each QoS type of external traffic;
determining a stochastic model of contention for the medium comprising one or more contention parameters responsive to the measurements for each type of external traffic and a quality of service associated with each type of traffic, wherein;
responsive to the amount of each QoS type of external traffic being below a preconfigured threshold, setting a Cw (contention window) back-off parameter and an AIFS (automatic interframe spacing) parameter to substantially zero to increase access to the medium, andresponsive to the amount of each QoS type of external traffic being at or above a preconfigured threshold, setting a Cw back-off parameter and an AIFS time that increases based on a larger amount of recent traffic for each QoS type to reduce access to the medium; and
contending for access to the medium separately for each type of traffic in response to the one or more contention parameters.
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Accused Products
Abstract
An AP having a message waiting time that provides proper QoS while losing minimal communication bandwidth, setting parameters for each level of QoS in response to a measure of the degree of contention for that level of QoS, and in response to a measure of the degree of contention for those levels of QoS with higher priority, and setting waiting time parameters in response to a stochastic model of contention at each level of QoS. Changes in contention at each level of QoS affect the AP'"'"'s waiting time parameters for that level of QoS and also for levels of QoS with lower priority. Operational parameters might include contention window time, AIFS time, and back-off value(s), and might be modified in response to message QoS.
130 Citations
8 Claims
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1. A computer-implemented method in an access point for accessing a medium for data transmission in a wireless communication system, the method comprising the steps of:
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determining a QoS (quality of service) type for traffic received at the access point, wherein more than one type of traffic is determined; separately queuing the traffic at the access point responsive to the QoS type of traffic for separate processing; measuring an amount of each QoS type of external traffic; determining a stochastic model of contention for the medium comprising one or more contention parameters responsive to the measurements for each type of external traffic and a quality of service associated with each type of traffic, wherein; responsive to the amount of each QoS type of external traffic being below a preconfigured threshold, setting a Cw (contention window) back-off parameter and an AIFS (automatic interframe spacing) parameter to substantially zero to increase access to the medium, and responsive to the amount of each QoS type of external traffic being at or above a preconfigured threshold, setting a Cw back-off parameter and an AIFS time that increases based on a larger amount of recent traffic for each QoS type to reduce access to the medium; and contending for access to the medium separately for each type of traffic in response to the one or more contention parameters. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A non-transitory computer-readable medium storing instructions that, when executed by a processor in an access point for accessing a medium for data transmission in a wireless communication system, perform a method comprising the steps of:
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determining a QoS (quality of service) type for traffic received at the access point, wherein more than one type of traffic is determined; separately queuing the traffic at the access point responsive to the QoS type of traffic for separate processing; measuring an amount of each QoS type of external traffic; determining a stochastic model of contention for the medium comprising one or more contention parameters responsive to the measurements for each type of external traffic and a quality of service associated with each type of traffic, wherein; responsive to the amount of each QoS type of external traffic being below a preconfigured threshold, setting a Cw (contention window) back-off parameter and an AIFS (automatic interframe spacing) parameter to substantially zero to increase access to the medium, and responsive to the amount of each QoS type of external traffic being at or above a preconfigured threshold, setting a Cw back-off parameter and an AIFS time that increases based on a larger amount of recent traffic for each QoS type to reduce access to the medium; and contending for access to the medium separately for each type of traffic in response to the one or more contention parameters.
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8. An access point in a wireless communication system, the access point comprising:
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a first module to determine a QoS (quality of service) type for traffic received at the access point, wherein more than one type of traffic is determined; a storage device to separately queue the traffic at the access point responsive to the QoS type of traffic for separate processing; a measurement module to measure an amount of each QoS type of external traffic; a contention module to determine a stochastic model of contention for the medium comprising one or more contention parameters responsive to the measurements for each type of external traffic and a quality of service associated with each type of traffic, wherein; responsive to the amount of each QoS type of external traffic being below a preconfigured threshold, setting a Cw (contention window) back-off parameter and an AIFS (automatic interframe spacing) parameter to substantially zero to increase access to the medium, and responsive to the amount of each QoS type of external traffic being at or above a preconfigured threshold, setting a Cw back-off parameter and an AIFS time that increases based on a larger amount of recent traffic for each QoS type to reduce access to the medium, wherein the contention module contends for access to the medium separately for each type of traffic in response to the one or more contention parameters.
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Specification