This paper assesses the media synchronization quality of audio-video transmission over the IEEE 802.11b wireless LAN under Bluetooth interference by experiment. In this situation, the temporal constraints of audio and video may be disturbed, since the Bluetooth interference cause delay jitter due to retransmission and carrier sensing in the MAC layer of IEEE 802.11b. In the experiment, a media ...

UNLABELLED In today's intensive care and surgery, a great number of cables are attached to patients. These cables can make the care and nursing of the patient difficult. Replacing them with wireless communications technology would facilitate patient care. Bluetooth is a modern radio technology developed specifically to replace cables between different pieces of communications equipment. In this...

Public buses play an important role in public transportation in most parts of the world and it is still the dominant public transportation mode in some regions. Nowadays, as people switch to a mobile lifestyle, they spend significant amount of time on the traveling to work, back and forth. However, not much research has been done on how to provide some on-board service for those commuters in th...

Recent updates of the Bluetooth specification have introduced significant changes in the Bluetooth protocol stack, including optional flow control. When the Bluetooth piconet is used to carry TCP traffic, complex interactions between TCP congestion control mechanisms and data link layer controls of Bluetooth will occur. In this paper, we model the performance of the piconet with TCP traffic, ex...

This paper studies the effect of Bluetooth wireless channels on distributed speech recognition. An approach for implementing speech recognition over Bluetooth is described. We simulate a Bluetooth environment and then incorporate its performance, in the form of packet loss ratio, into the speech recognition system. We show how intelligent framing of speech feature vectors, extracted by a fixed-...

In resource-limited mobile computing devices, Bluetooth wireless technology imposes a weighty burden due to inef£cient power utilization and a sluggish device discovery process. Buttressing Bluetooth with Radio Frequency Identi£cation (RFID) technology by performing an operation we call “Rendez-Blue” alleviates these limitations. In the Rendez-Blue process, an RFID signal is used as a cue to “w...

Bluetooth is a wireless communication technology that provides short-range, small-size, low-cost, and low-power connectivity among mobile devices. The MAC protocol for Bluetooth is based on a Time Division Duplex (TDD) scheme, where the master determines channel access to all other slaves in the piconet. Hence, the polling scheme used by the master has a significant effect on the Bluetooth syst...

wireless, BlueTooth, TCP/IP, BNEP, inquiry This paper describes our experiences implementing the Connection Diversity framework over the BlueTooth wireless link layer. The goal of this work is to enable TCP / IP applications to transparently use BlueTooth. First, we describe how Connection Diversity interfaces to the link layer and its requirements. We explain in detail various aspects of the i...

Bluetooth is a technology for connecting devices wirelessly to achieve data transfer at the rate of 720 kbps within a range of 10 to 100 meters. In existing authentication procedure for Bluetooth networks, four levels of key generation viz initialization key , combination key, link key, encryption key were incorporated. Bluetooth devices have limited resources, so we need a small authentication...

The vision of ad-hoc networking with Bluetooth includes the concept of devices participating in multiple ”piconets” and thereby forming a ”scatternet”. However, the details of scatternet support for Bluetooth are not specified yet. This paper presents a scheme for Bluetooth scatternet operation that adapts to varying traffic patterns. Basing on sniff mode, it does not require substantial modifi...