Throughput enabled rate adaptation in wireless networks
First Claim
1. A method for rate adaptation implemented by a wireless node in a digital wireless communication network, the method comprising:
- measuring by the wireless node throughput attained while communicating at different data rates on a channel in the digital wireless communication network;
calculating by the wireless node from the measured throughput a current transmission rate without any a priori knowledge of a state of the channel;
transmitting by the wireless node on the digital wireless communication network at the calculated rate;
wherein calculating from the measured throughput a current transmission rate comprises calculating a ratio of the measured throughput with respect to an exponential weighted moving average of the measured throughput;
wherein calculating the ratio of the measured throughput with respect to an exponential weighted moving average of the measured throughput is performed at a polling frequency; and
wherein the polling frequency is decreased if the measured throughput oscillates.
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Abstract
Rate adaptation in a digital wireless communication network is performed by measuring by a wireless node data throughput values attained while communicating at different data rates on a channel in the network. The node calculates from the measured throughput alone a current transmission rate without any a priori knowledge of a state of the channel. The transmission rate calculation involves calculating a ratio of the measured throughput with respect to an exponential weighted moving average of the measured throughput. By repeating the measurements and calculations periodically, the rate used for transmission by the node is adapted automatically.
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3 Claims
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1. A method for rate adaptation implemented by a wireless node in a digital wireless communication network, the method comprising:
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measuring by the wireless node throughput attained while communicating at different data rates on a channel in the digital wireless communication network; calculating by the wireless node from the measured throughput a current transmission rate without any a priori knowledge of a state of the channel; transmitting by the wireless node on the digital wireless communication network at the calculated rate; wherein calculating from the measured throughput a current transmission rate comprises calculating a ratio of the measured throughput with respect to an exponential weighted moving average of the measured throughput; wherein calculating the ratio of the measured throughput with respect to an exponential weighted moving average of the measured throughput is performed at a polling frequency; and wherein the polling frequency is decreased if the measured throughput oscillates. - View Dependent Claims (2, 3)
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Specification