Scatternet Formation for Multimedia Applications over Bluetooth Personal Area Networks.
- Navendu Jain
M.Tech. thesis, IIT Delhi.
Bluetooth is a new promising local real wireless technology for pervasive computing designed to enable voice and data communication among various electronic devices. Though not specified in version 1.1 of the Bluetooth specification, communication by way of multihop routing (so characteristic of ad-hoc networks) within a scatternet will offer a new and exciting extension to this technology. And the topology of such an ad-hoc scatternet would have significant effect on the overall performance of the network. The existing algorithms often become infeasible because they use models where the discovering devices broadcast their Ids and exchange substantial information in the initial stages of the algorithm. Hence the need is to optimize on the topolgy construction and packet forwarding latency taking into account the limited computing capabilities of the devices.
In this thesis, we present “BTSF” as a novel and practical scheme for building an efficient scatternet and discuss the basic rules followed by the BTSF scheme. This design of the algorithm and application architecture has been targeted towards real-time multimedia specific applications. The algorithm achieves in simplifying both networks formation and routing problems while minimizing the number of piconets. It is both decentralized and self healing, in that nodes can join and leave at any time without causing long disruptions in connectivity.
To illustrate this framework, we have developed a bluetooth emulator based on an application architecture for implementation of Multimedia Applications running on the Bluetooth Personal Area Network. In the application framework, various scatternet formation algorithms as well as ad-hoc routing protocols are available as modules which could be loaded depending on the user-requirements.
Finally the effectiveness and performance comparison of the BTSF scheme is evaluated through simulation experiments based on the Bluetooth communication model.