| Summary |
In wireless mesh networks using IEEE 802.11 wireless LAN, it is desirable
to select and use an optimum transmission rate for each link.
Semi-fixed rate control (SFRC) is a technique that determines an optimum
transmission rate during the auto-rate period, and then uses it during
the fixed-rate period. However, evaluation of the link
quality and determination of the best timing to switch from the
fixed-rate period to the auto-rate period are the existing challenges.
In addition, IEEE 802.11n, whose throughput performance
can be enhanced by employing multiple
antennas, is very sensitive to the link quality, and the optimum
transmission rate is therefore also sensitive.
Thus, the time required to switch from the fixed-rate period to the
auto-rate period is more important for IEEE 802.11n.
In this paper, we investigate the relationship between the received
signal strength indicator (RSSI) of each antenna and the optimum
transmission rate, and propose methods for switching from the fixed-rate
period to the auto-rate period for SFRC. The experimental results
indicate the effectiveness of the proposed methods. |
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