1. MobiHealth Communication Infrastructure Measurement strategy of E2E communication link MobiHealth WP3 meeting November 13, 2002 MobiHealth Team, University of Twente email: mhealth@mobihealth.org Internet: www.mobihealth.org

2. Presentation layout ♦Problem statement – identifying segments of the communication link in E2E connection ♦Possible scenarios of communication infrastructures ♦Proposed measurement strategy ♦Measurements’ assumptions & requirements ♦Schedule of activities

3. Problem statement Segments of communication link in E2E connection: ♦ Due to the fact that end-host cannot communicate directly with the Sensor we consider: E2E communication link: MBU ↔ end-host

4. Problem scenarios for different wireless technologies 1. Applying 2.5G technology - GPRS

5. Problem variants for different wireless technologies (cont.) 3. Applying 3G technology - UMTS 2. Applying WLAN plus 2.5G technologies – VTT scenario

6. Proposed measurement strategy ♦ Firstly: delay, data loss, throughput characteristics of the E2E link Due to the fact, that for now we don’t have an insight into the Mobile Operator Network our measurement approach is as follows:

7. Proposed measurement strategy (cont.) ♦ Secondly: service coverage, mobility support These characteristics are specific for the Operator’s Network and could be derived by means of measurements done with help of the service providers – Mobile Operators… Proposed approach: Measurements between points A-A’; Derivation of delay, throughput, data loss characteristics (distribution functions) Measurements between points B-B’, where part of the link A-A’ is a “black-box”; derivation of B-B’ characteristics of the link as above Simulation of the whole E2E communication link (programming); playing with the parameters derived from measurements: MBU and Application host (e.g. changing the scheduling discipline) and observing the influence for the E2E characteristics Conclusion is the theoretical model for the E2E communication link

8. Measurements’ assumptions & requirements ♦ Step-by-step derivation of system’s characteristics, where each step is going deeper into the details of particular segment ♦ High number of measurements (samples) to guarantee the statistical correctness ♦ Access to the operator infrastructure to place measurement probes ♦ Due to the fact, that at UT we have good communication infrastructure – 2Gb/s pipe to the Internet – we need some kind of average performance model of the Internet and Enterprise network

9. Schedule of activities ♦Start date : December 1, 2002 ♦Literature study ♦Problem definition phase (2 mth) ♦Measurements phase (2 mth) ♦Simulation phase (3 mth) ♦Conclusion : theoretical model (2 mth) November 1, 2003

10. …any questions ?