An 802.11n wireless local area network transmission scheme for wireless telemedicine applications

摘要

In this paper, an 802.1 In transmission scheme is proposed for wireless telemedicine applications. IEEE 802.1 In standards, a power assignment strategy, space-time block coding (STBC), and an object composition Petri net (OCPN) model are adopted. Wit h the proposed wireless system, G.729 audio bit streams, Joint Photographic Experts Group 2000 (JPEG 2000) clinical images, and Moving Picture Experts Group 4 (MPEG-4) video bit streams achieve a transmission bit error rate (BER) of 10~(-7), 10~(-4), and 10~(-3) simultaneously. The proposed system meets the requirements prescribed for wireless telemedicine applications. An essential feature of this proposed transmission scheme is that clinical information that requires a high quality of service (QoS) is transmitted at a high power transmission rate with significant error protection. For maximizing resource utilization and minimizing the total transmission power, STBC and adaptive modulation techniques are used in the proposed 802.11n wireless telemedicine system. Further, low power, direct mapping (DM), low-error protection scheme, and high-level modulation are adopted for messages that can tolerate a high BER. With the proposed transmission scheme, the required reliability of communication can be achieved. Our simulation results have shown that the proposed 802.11n transmission scheme can be used for developing effective wireless telemedicine systems.