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We have noted that several papers that address the performance of Bluetooth (BT) over a fading channel implicitly assume a perfectly interleaved channel and neglect the bursty nature of a fading channel. The goal of this paper is to analyze the effects of this incorrect assumption on BT'S performance over a frequency-flat Rayleigh block fading channel. Despite the simplicity of the analysis, we obtain interesting results not previously reported in the literature. We will show that neglecting the bursty nature of the channel leads to overlypessimistic conclusions about the performance of Bluetooth in the low SNR region and, thus, that many reported results on the coexistence of Bluetooth and 802.11 are overly-pessimistic. Moreover, we also conclude that the coding strategy used in Bluetooth has little or no effectiveness on a frequency-flat Rayleigh block fading channel. 0-7803-8255-W2O.W e2004 IEEE.260.5

Abstract-In an effort to realize wireless Internet telephony and multimedia streaming in a highly mobile environment a testbed emulating a wireless Internet has been built. This would allow setting up multi-media calls between IP mobiles and integration between IP and PSTN end-points in a wireless environment. Different functionalities and components involved with the wireless Internet streaming multimedia have been prototyped and experimented in the testbed. These include signaling, registration, dynamic binding, location mangamenet as well as supporting the QoS features for the mobile users. This paper describes some of the components of the testbed and highlights the experiences while building this testbed which could be beneficial to some who plan to build a similar testbed to realize several features and capabilities of Mobile Wireless Internet, before actually bringing to the market.

Traditionally, signal-to-noise ratio of a mobile determines the handoff dynamics of the mobile. But in certain cases, precise location of the mobile augmented by information services, such as IEEE 802.21 MIS, can expedite the handoff with similar performance results. We illustrate an experimental system that takes advantage of the mobile's relative location with the neighboring access point to perform proactive handoff. It keeps track of the current location of the mobile and then uses the information from the neighboring networks to help perform the proactive handoff. Proactive handover technique helps the mobile to communicate with these networks before the handover is complete thereby reducing the delay and packet loss. In some cases, location-assisted handover could prove to be more useful compared to the handover technique based on signal-noise-ratio.

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