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Converged Broadband Optical and Wireless Communication Infrastructure for Next- Generation Telehealth Arshad Chowdhury, Hung-Chang Chien, Sourabh Khire,

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Presentation on theme: "Converged Broadband Optical and Wireless Communication Infrastructure for Next- Generation Telehealth Arshad Chowdhury, Hung-Chang Chien, Sourabh Khire,"— Presentation transcript:

1 Converged Broadband Optical and Wireless Communication Infrastructure for Next- Generation Telehealth Arshad Chowdhury, Hung-Chang Chien, Sourabh Khire, Shu-Hao Fan, Nikil Jayant and Gee-Kung Chang Georgia Tech Broadband Institute Presentation by John Shu

2 Agenda Terminology Trends Motivation Key Issues Solutions Implementation Results Conclusion

3 Terminology Telehealth/Telemedicine Systems: Systems that facilitate the exchange of electronic information e.g. medical images and real time video for remote monitoring, diagnosis, telesurgery etc. [Arshad Chowdury et al] Radio Over Fiber: A transmission technology where by light is modulated by a radio signal and transmitted via an optical fiber link to facilitate wireless access. (Wikipedia)

4 Terminology cont’d RAU Remote Antenna Unit used in conjunction with the Radio-Over- Fiber backbone to transmit and receive from wireless devices. IMGR Intelligent Modality Gateway Router provides signal processing for various protocol-independent wireless-band conversion (RF, Microwave, and millimeter wave), routing functionalities, necessary media conversions, local buffering and storage, and authentication and security functions. [Arshad Chowdury et al]

5 Motivation Telehealth and related fields are used world wide to remedy the non-uniform distribution of healthcare professionals. According to the authors, these systems facilitate the exchange of information e.g. CT Scans, Radiology images or Real time videos. This permits remote diagnosis, monitoring, telesurgery etc

6 Motivation cont’d Increase patient reach in rural areas Facilitate access to specialty health care in urban areas Obtain second opinion from remotely located experts Support remote health monitoring Facilitate remote education of upcoming professionals

7 Trends in the Field In the past, low bit rate voice or text based phone consultation as well as monitoring patients. Currently, more HD quality video-centric super high resolution image-intensive remote diagnosis applications. Also, real time delivery of multimedia such as in Telesurgery which has numerable benefits e.g. education or obtaining second opinions

8 Key Issues Transmission of high resolution images A single Whole Slide Image (WSI) of 20mm X 15 mm sampled at 0.25 microns at about 24 bits/pixel can occupy up to 15GB Furthermore, if Z-Stack images are being used i.e. using multiple focal lengths. The resulting file size will be in the order of hundreds of GB or even TB

9 Key Issues Issues with real time or time sensitive applications Applications such as Frozen section diagnosis, dynamic pathology and real time tele-radiology. Transmitting 500MB MRI coast-to-coast has RTT of about 10 hours over 1.5Mb/sec T1 lines and 50 sec with 1Gb/s line

10 Key Issues Compression could be a potential solution, but aggressive ‘lossy’ compression can introduce objectionable artifacts. The problem of transmission technology which includes closed networks from service providers that limit broad band adoption in hospitals There is also the issue of network penetration in the hospital buildings. Some of them can have very secluded areas with dense walls.

11 Proposed Solution Distributed Antenna based optical wireless systems realized by radio over fiber technology can solve penetration issues. An integrated network architecture and communication system using broadband optical wireless radio over fiber technology. Proposed systems provides multi-service, multi-carrier broadband modalities of the telemedicine system

12 Implementation FIg.1 Converged Broadband Optical and Wireless Communication Infrastructure for Next- Generation Telehealth

13 Implementation Radio-over-fiber networks providing connectivity through out large buildings. In-building backbone to transmits the signal. Remote Antenna Unit (RAU) distributes wireless signal. Devices such as text, multimedia, radiology, pathology or just monitoring devices can access the network.

14 Implementation At the core is the Intelligent Modality Gateway Router (IMGR) The IMGR provides signal processing for various protocol independent wireless band conversions (e.g. RF, Microwave, millimeter wave). It also handles routing functionalities, media conversions, local buffering and storage, authentication and security

15 Network Interconnection in Health care facility. Fig.2 Converged Broadband Optical and Wireless Communication Infrastructure for Next-Generation Telehealth

16 Implementation Communication between MRI, radiology, remotely mounted camera in operation room and conference room IMGR receives hi-res as well as uncompressed images and HD video signals and performs up conversions for wireless modalities. Hi-res images can be examined by remote specialist or students a remotely view procedures in real time or stand-by specialist can offer their opinions

17 Proof of Concept Experimental Setup Setup optical wireless network using 60 GHz mm wave radio-over-fiber technology. Unidirectional real time uncompressed HD video link between labs on Georgia tech campus Link comprised of optical fiber network for 25 km and a wireless transmission for distance of 5 meters.

18 Experimental Setup Fig.3 Converged Broadband Optical and Wireless Communication Infrastructure for Next-Generation Telehealth

19 Results A 1.5Gb/s output stream was up-converted to 60GHz mm wave and transmitted over radio-over-fiber link Wireless signal was received by a 60 GHz radio receiver and displayed on an HD TV Live feed was that of Glioblastoma. Pictures were clear with no perceptual loss of quality

20 Conclusion Proposed next-generation broadband transport and access architecture using integrated wireless radio over fiber technology Demonstrated with proof of concept setup experimental setup using single mode optical fiber and RAU. Achieved virtually no perceptual loss of quality Employed existing and emerging 3G,4G/LTE, Wi-Fi, Wi-Max all routed through their IMGR

21 References A. Chowdhury, H-C Chien, Y-T Hsueh, G-K Chang, "Advanced System Technologies and Field Demonstration for In-Building Optical-Wireless Network with Integrated Broadband Services," J. of Lightwave technologies, vol. 27, no. 12, pp1920 - 1927, June 2009 I. Pratap et al, "Comparative technical evaluation of various communication media used for telemedical video- conference," HealthCom 2008, July 2008, pp 1-2 D.K. Kim et al, "A Mobile telemedicine system for remote consultation system in cases of acute stroke," Jour. Telemedicine and Telecare, Vol. 15, pp. 102-107,2009


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