MobiHealth Communication Infrastructure

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Presentation transcript:

MobiHealth Communication Infrastructure MobiHealth WP3 meeting September 20, 2002 MobiHealth Team, University of Twente Email: mhealth@mobihealth.org Internet: www.mobihealth.org 11/23/2018 MobiHealth IST-2001-36006

Presentation Layout MobiHealth Communication Infrastructure Communication Requirements How to proceed? Info: MobiHealth testbed Netherlands 11/23/2018 MobiHealth IST-2001-36006

MobiHealth Communication Infrastructure “Communication infrastructure for bi-directional multimedia data communication between a MobiHealth BAN and arbitrary host on the Internet.” Communication infrastructure issues: Speed Coverage Availability Scalability Mobility Security … 11/23/2018 MobiHealth IST-2001-36006

MobiHealth External Communication Environment IEEE 802.3/11/15 IEEE 802.11/15 2.5G, 3G Three communication domains: Healthcare (e.g. Hospital) Public access (mobile operator network) Home (premises, in-house + garden) IEEE 802.3 – Ethernet (wired) IEEE 802.11 – WLAN: FHSS, DSSS (x.a,x.b) IEEE 802.15 – WPAN: Bluetooth (x.1) IP ► Focus 2.5G, 3G 11/23/2018 MobiHealth IST-2001-36006

Communication Requirements “Communication requirements are derived from the MobiHealth system requirements.” MobiHealth system - application, BANOS, BAN GPRS or UMTS as ‘bearer service’ (mandatory) IP = network protocol (Internet standard) Performance (e.g. ‘goodput’ = speed, delaymax) Coverage (GPRS and/or UMTS) Reliability (e.g. packet loss, availability) Traffic management (e.g. prioritization of data) Mobility of a BAN (network node) Security (e.g. authentication, authorization, encryption) … 11/23/2018 MobiHealth IST-2001-36006

Communication Requirements (cont.) Performance Depends on BAN application = MobiHealth trials example: MST trauma team Bandwidthu: peak(ti=30) 236 kbps, sustained 20-100 kbps Bandwidthd: 64-256 kbps Max speed E2E connection = speed slowest segment GPRS ~ 14-112 kbps (CS2 coding) UMTS ~ 64-144 kbps High delay between transmission and receipt of a packet GPRS ~ 1500ms avg. (ICMP) roundtrip delay UMTS ~ ??? 11/23/2018 MobiHealth IST-2001-36006

Communication Requirements (cont.) Coverage (GPRS and/or UMTS) Depends on BAN application = MobiHealth trials example: City of Barcelona (ES), Lulea (S) region, Enschede (NL) city centre, Duisburg (D) region 11/23/2018 MobiHealth IST-2001-36006

Communication Requirements (cont.) Reliability Transport of patient vital sign data, remote control of BANs. What to aim for? 99.999% uptime? 100% error free communication? Where to implement? Application Layer protocols: http, … Transport Layer CO service (TCP): E2E reliable delivery, flow control CL service (UDP): unreliable delivery, no flow control Lower Layers (Network, Link, Physical)? How to evaluate reliability of MobiHealth infrastructure? 11/23/2018 MobiHealth IST-2001-36006

Communication Requirements (cont.) Traffic management Transport of patient vital sign data, remote control of BANs. Guaranteed bidirectional communication in congested networks MNO, Internet, Enterprise network, … Mobile Network Operators: No voice over data priority scheme! How to deal with traffic management in the MobiHealth infrastructure? 11/23/2018 MobiHealth IST-2001-36006

Communication Requirements (cont.) Security Transport of personal (medical) data, remote control of a BAN, … Is end-to-end (BAN-to-Internet host) security needed? What level? Depends on user requirements (WP1)! Security can be added to most communication layers! Different security features depending on layer: Link layer: Bluetooth, GPRS/UMTS, ... Network layer: IPsec, ... Transport layer: SSL/TLS, HTTPS, ... Application layer: Data encryption (OpenSSL Libraries, MIME) 11/23/2018 MobiHealth IST-2001-36006

Communication Requirements (cont.) Mobility of a BAN Cross border connectivity? Speed limitation? (e.g. MST trauma trial 80-100 km/hr) Application disruption? How to handle “handovers”? … 11/23/2018 MobiHealth IST-2001-36006

Communication Requirements (cont.) Mobility of a BAN Internet MNO Horizontal Handover BAN Intranet 11/23/2018 MobiHealth IST-2001-36006

Communication Requirements (cont.) Mobility of a BAN BAN Internet MNO Vertical Handover Intranet MNO 11/23/2018 MobiHealth IST-2001-36006

How to proceed? WP1 user requirements needed: Performance, coverage, reliability, security WP2 system requirements needed Derived from WP1 WP3 communication infrastructure requirements Derived from WP1 and WP2 WP3 preliminary testing ‘testdrive’ with plain IP E2E communication develop measurement strategy: performance, reliability (incl. mobility), coverage, security 11/23/2018 MobiHealth IST-2001-36006

MobiHealth testbed Netherlands 11/23/2018 MobiHealth IST-2001-36006