Interference of 802.11B WLAN and Bluetooth: Analysis and Performance Evaluation

IEEE 802.11 and Bluetooth, these two operating in the unlicensed 2.4 GHz frequency band are becoming more and more popular in the mobile computing world. The number of devices equipped with IEEE 802.11 and Bluetooth is growing drastically. Result is the number of co-located devices, say within 10 meters, grown to a limit, so that it may causes interference issues in the 2.4 GHz radio frequency spectrum. Bluetooth supports both voice synchronous connection oriented (SCO) data and asynchronous connection less (ACL) packets. In this paper, we investigate the interference issues of 2.4 GHz frequency band. In addition, this paper presents a new Bluetooth voice packet Synchronous Connection Oriented with Repeated Transmission (SCORT) scheme to optimize the performance of 2.4 GHz frequency band by minimizing the interference between Bluetooth and 802.11 wireless networks. For the sake of experimental verifications, we provide a comprehensive simulation results using Matlab Simulink

Design and evaluation of practical coexistence management schemes for Bluetooth and IEEE 802.11b systems

Bluetooth and IEEE 802.11b standards share the same unlicensed ISM (Industrial, Scientific, Medical) radio spectrum. As such, severe interference is inevitable and performance can be impaired significantly when heterogeneous devices using the two technologies come into close proximity. We propose a new approach called ISOAFH (Interference Source Oriented Adaptive Frequency Hopping) based on a memory and power efficient channel classification process, thereby reducing the time and space complexity of the mechanism. Through our MATLAB Simulink based simulations of various coexistence mechanisms, we find that the IEEE 802.15 Task Group 2 (TG2) AFH performance is sensitive to memory and power limitations, while ISOAFH is less sensitive to these constraints and can keep a lower channel collision rate. In view of the potential implementation difficulties for AFH based approaches, we also propose a time domain mechanism called ISOMDMS (ISO Master Delay MAC Scheduling). © 2006 Elsevier B.V. All rights reserved.link_to_subscribed_fulltex