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This paper evaluates the performance of the IEEE 802.11 broadcast traffic under both saturation and non- saturation conditions. The evaluation highlights some important characteristics of IEEE 802.11 broadcast traffic as compared to corresponding unicast traffic. Moreover, it underlines the inaccuracy of the broadcast saturation model proposed by Ma and Chen due to the absence of backoff counter freeze...
This paper investigates the relative performance of unicast and broadcast traffic traversing a one-hop ad hoc network utilising the 802.11 DCF. An extended Markov model has been developed and validated through computer simulation, which successfully predicts the respective performance of unicast and broadcast in a variety of mixed traffic scenarios. Under heavy network traffic conditions, a significant...
Although the IEEE 802.11e enhanced distributed channel access (EDCA) can differentiate high priority traffic such as real-time voice from low priority traffic such as delay- tolerant data, it can only provide statistical priority, and is characterized by inherent short-term unfairness. In this paper, we propose a new distributed channel access scheme through minor modifications to EDCA. Guaranteed...
The purpose of the mobile location analysis is to study the mobile location accuracy, reliability, and robustness of the RF fingerprinting solution by means of the indoor WLAN signal strength measurements. First, we have compared two measurement sets collected on different days in the same building. The results of the location error are very similar which implies that these two measurements are almost...
A dual-band direct-conversion RF transceiver for IEEE 802.11 a/b/g WLAN is implemented in 0.18 /spl mu/m CMOS technology with 6 mm/sup 2/ die size and 182 mW power dissipation while transmitting 1 dBm at 5 GHz. The receiver achieves 5 dB NF, -8 dBm IIP3 (high LNA gain), 96 dB total gain, and -31.4 dB EVM. The transmitter achieves 1 dBm and 2.5 dBm linear output power at 5 GHz and 2.4 GHz, respectively,...
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