US 9,807,802 B2 · Method and device for adjusting contention window value adaptively

Abstract

A method and device for adjusting contention window value adaptively are disclosed. The method comprises the following steps: the number n of stations participated in a contention currently is measured; according to the number n of stations participated in the contention currently, a practical collision probability Pc of a current contention window value CWold and optimal collision probability Pcopt, under the maximum network throughput are acquired; when a data frame is sent successfully, an initial contention window value CWinit is adjusted according to the practical collision probability Pc and optimal collision, probability Pcopt; when a data frame is sent unsuccessfully, a retransmission contention window value CWnew adjusted according to said practical collision probability Pc. The above solution can better reflect network collision situation, adaptively adjust an initial contention window value and retransmission contention window value jointly.

Claims14

Dependent claims

A method for adjusting contention window value adaptively, comprising:

measuring a number n of stations participated in a contention currently;
acquiring a practical collision probability Pc of a current contention window value CWold and optimal collision probability Pcopt under maximum network throughput according to the number n of stations participated in the contention currently;
when a data frame is transmitted successfully, adjusting an initial contention window value CWinit according to the practical collision probability Pc and optimal collision probability Pcopt;
and
when the data frame is transmitted unsuccessfully, adjusting a retransmission contention window value CWnew according to the practical collision probability Pc.

2 more elements

A device for adjusting contention window value adaptively, comprising:

a memory;
and
a hardware processor, configured to execute programming components stored in the memory, wherein the programming components comprise:
a measurement component configured to measure a number n of stations participated in a contention currently;
an acquisition component configured to acquire a practical collision probability Pc of a current contention window value CWold and optimal collision probability Pcopt under maximum network throughput according to the number n of stations participated in the contention currently;
a first adjustment component configured to adjust an initial contention window value CWinit according to the practical collision probability Pc and optimal collision probability Pcopt when a data frame is transmitted successfully;
and
a second adjustment component configured to adjust a retransmission contention window value CWnew according to the practical collision probability Pc when a data frame is transmitted unsuccessfully.

5 more elements

Dependencies are inferred from the claim text.

Method and device for adjusting contention window value adaptively

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Method and device for adjusting contention window value adaptively

Life of this patent

Abstract

Claims14