Aggregation mechanism for moving vehicles
AssigneeCisco Technology, Inc.
InventorsEvgeny Yankevich, Paul Stager, Matt Silverman
Life of this patent
Estimating the term…
Abstract
In one embodiment, a method implemented on an access point of a wireless communication system includes: determining an estimate for a relative velocity between a mobile wireless client device and the access point, the mobile wireless client device communicating wirelessly with the access point over a channel; determining a channel coherence time for the channel using said estimated relative velocity; and determining a maximum aggregated frame size based on the determined channel coherence time.
Claims20
A method implemented by an access point of a wireless communication system, the method comprising:
- determining an estimated relative velocity between a mobile wireless client device and said access point, said mobile wireless client device communicating wirelessly with said access point over a channel;
- determining a channel coherence time for said channel using said estimated relative velocity;
- determining a maximum aggregated frame size based on a maximum physical layer conversion protocol data unit in Orthogonal Frequency Division Multiplexed (OFDM) symbols determined according to the channel coherence time, a physical layer preamble length in OFDM symbols, a duration of an OFDM symbol, and a number of uncoded data bits per OFDM symbol;
- and
- dynamically aggregating packets that are to be transmitted to the mobile wireless client device based on the maximum aggregated frame size.
An access point controller comprising:
- a processor, said processor being operable to:
- determine an estimate relative velocity between a mobile wireless client device and an access point, said mobile wireless client device communicating wirelessly with said access point over a channel;
- determine a channel coherence time for said channel using said estimated relative velocity;
- determine a maximum aggregated frame size based on a maximum physical layer conversion protocol data unit in Orthogonal Frequency Division Multiplexed (OFDM) symbols determined according to the channel coherence time, a physical layer preamble length in OFDM symbols, a duration of an OFDM symbol, and a number of uncoded data bits per OFDM symbol;
- and
- dynamically aggregate packets that are to be transmitted to the mobile wireless client device based on the maximum aggregate frame size.
One or more non-transitory computer readable storage media encoded with software comprising computer executable instructions and when the software is executed operable to:
- determine an estimated relative velocity between a mobile wireless client device and an access point, said mobile wireless client device communicating wirelessly with said access point over a channel;
- determine a channel coherence time for said channel using said estimated relative velocity;
- determine a maximum aggregated frame size based on a maximum physical layer conversion protocol data unit in Orthogonal Frequency Division Multiplexed (OFDM) symbols determined according to the channel coherence time, a physical layer preamble length in OFDM symbols, a duration of an OFDM symbol, and a number of uncoded data bits per OFDM symbol;
- and
- dynamically aggregate packets that are to be transmitted to the mobile wireless client device based on the maximum aggregate frame size.
Dependencies are inferred from the claim text.