Quality of Service Evaluation of Telemedicine etwork Design with IEEE 802.11b Technology

Telemedicine etworks should meet specific Quality of Service (QoS) requirements to guarantee that the users can work with the supported applications in a reliable manner. Therefore it must be verified that network resources satisfy these requirements especially in wireless networks, due to their channel characteristics: Communication over a wireless link often suffers from limited bandwidth, high error rates and interference from other users on the shared channel. This paper describes the performance evaluation of a simulated Telemedicine etwork supporting various applications. To begin with, QoS parameters and transmission data methods are discussed. Subsequently the following subjects are described: simulation methodology, network simulation software used (OP ET), simulated network and modeled applications. The simulation results suggest that the network does not meet QoS bandwidth and delay requirements when supporting the simultaneous use of all modeled applications in the individual client stations. Further mechanisms are necessary to ensure the required quality.