Telefónica Móviles España

Status of trial-ready GPRS and UMTS

networks in the trial countries

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Status of trial-ready GPRS and UMTS

networks in the trial countries

GPRS and UMTS state in each trial site

Technical requirements and limitations

in each trial scenario

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GPRS and UMTS situation in each trial site

Operators GPRS communication

infrastructure: Commercially available providers GPRS roaming partnership Coverage maps

UMTS state

Spain The Netherlands

SwedenGermany

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GPRS and UMTS situation in Spain• Operator: Telefónica Móviles España• GPRS communication infrastructure:

– Commercially available provider: Nokia– GPRS roaming partnership:

Countries/Operators where MoviStar customers have ROAMING GPRS

available

COUNTRY OPERATOR WAP GPRS (*)

INTERNET GPRS (*)

INTRANET GPRS (*)

Operator customers have GPRS with

MoviStar Germany T-Mobile Deutschland available available available YES

E-Plus available available available YES O2 Germany available available available YES The Netherlands

KPN available available available YES

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GPRS and UMTS situation in SpainGPRS Coverage maps:

TME offers national coverage for GPRS network

GPRS coverage in Barcelona city and surroundings, where the trials will take place

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GPRS and UMTS situation in Spain

• UMTS state:– Telefónica Móviles España has UMTS radio coverage in 21

Spanish cities since the 1st June 2002.

– TME is working in the commercial launching for the beginning of 2004.

– Anyway, the availability of UMTS devices will determine the commercial launching of UMTS services.

– Due to the problems for the deployment of new antenna in urban zones, the UMTS test bed for the trials will be limited to restricted points of coverage.

– We are working on having a test bed in Madrid during the trials for a limited period of time. Interoperability issues make difficult to be ready in Barcelona area during the project.

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GPRS and UMTS situation in The Netherlands

• Operators: O2 (GPRS) and Vodafone (UMTS)

• GPRS communication infrastructure:– Commercially available provider: Ericsson

– GPRS roaming partnership: O2 offers GPRS roaming service in Germany

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– Coverage maps:O2 provides coverage to the 98% of the population.

GPRS coverage in Enschede and surroundings, where the trials will take place

GPRS and UMTS situation in The Netherlands

• UMTS state:

Vodafone will provide its pre-commercial UMTS network infrastructure in the Twente region for the MobiHealth trials

during a limited period of time.

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GPRS and UMTS situation in Germany

• Operators: D2-Vodafone (GPRS)

• GPRS communication infrastructure:– Commercially available provider: Siemens

– GPRS roaming partnership: D2-Vodafone has GPRS roaming agreement with Vodafone in the Netherlands

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– Coverage maps:D2-Vodafone provides coverage to the 98% of the population.

GPRS coverage in Duigsburg and surroundings, where the trials will take place

GPRS and UMTS situation in Germany

• UMTS state:

There will not be a UMTS test in Germany in a first step. At a later stage, it is possible that there will be any contact with a German mobile operator for the UMTS trials.

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GPRS and UMTS situation in Sweden

• Operators: Telia

• GPRS communication infrastructure:– Commercially available provider: Ericsson / Nokia

– GPRS roaming partnership: Telia has GPRS roaming agreements with 18 mobile operators in 16 countries around the world. The interesting roaming partnerships for the project are:

COUNTRY OPERATOR Germany T-Mobile

Spain Amena

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– Coverage maps:

GPRS coverage offered by Telia.

GPRS coverage in Lulea and surroundings, where the trials will take place

GPRS and UMTS situation in Sweden

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GPRS and UMTS situation in Sweden

• UMTS state:– Telia and Tele2 have 50-50 partnership in Svenska UMTS-

Nät AB, the company responsible for the third generation UMTS network in Sweden. Telia and Tele2 have rolled out base stations in most Swedish cities according to the commitment to PTS (Post och Telestyrelsen) in Sweden.

– Telia don’t support 3G commercial services at the moment, but will start testing UMTS services soon.

– Telia will intend to incorporate MobiHealth trials in the overall service tests. This means also that the MobiHealth UMTS trials might be moved from Luleå area to some other test site.

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Technical requirements and limitations in each trial scenarioSome important issues to be considered while defining the communication infrastructure between the BAN and the client application in the hospital are:

• Bandwidth

• Coverage and availability

• Reliability

• Traffic management

• Security

• Mobility

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GSM Voice: 1 conversation 1 channel

1 channel for GSM data 9.6 kbps

1 2 3 4 5 6 7 8Radio Carrier: 8 channels

GPRS: Use of until 8 channels per userDepending on the code algorithm, we can get several transmission rates: CS- 1: 9.05 kbps/slot CS- 3: 15.6 kbps/slotCS- 2: 13.4 kbps/slot CS- 4: 21.4 kbps/slot

Actually terminals use different number of slots:

4 (downlink) + 2 (uplink)

UMTS:

64 Kbps (both Uplink and Downlink). Circuit switching domain (CSD)128 Kbps (both Uplink and Downlink). Packet switching domain (PSD)

GPRS and UMTS rates

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Bandwidth• GPRS The maximum bit rate depends mainly on the number of

available timeslots and the coding scheme used for the communication.

• UMTS We assume a link of 64 kbps

Network Tg (kbps) overhead / loss (%) Tn (kbps) 2.5G_cs1.ts1 9,05 10 8,15 2.5G_cs1.ts2 18,10 10 16,29 2.5G_cs2.ts1 13,40 10 12,06 2.5G_cs2.ts2 26,80 10 24,12

3G 64,00 10 57,60

According to the technology available today:

Codings schemes CS1 and CS2

Terminals (2 time slots for the uplink),

and considering a maximum data overhead/loss rate of 10%, the maximum bit rate for GPRS and UMTS are:

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Bandwidth

• The required bandwidth and the transmission times depend on the amount of data generated by the BAN (according to the used sensors and the duration of the measurement session) and the technology used for transmitting.

• Two options for transmitting:

– Real–time transmission -> The link has to offer enough bandwidth

– No real-time transmission:

Maximum transmission time (for the worse case: CS1 / 1TS)

Minimum transmission time (for the best case: CS2 / 2TS)

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Bandwidth for real time transmission

Required Bandwidth (kbps)

14,62 14,8

3,07

15,55

3,76

14,49

2,73

5,73,25

32,79

NURSEOUTDOOR

TRAUMA PARAMEDIC

TRAUMA PATIENT

PREGCARDIO

LIGHTRA RESP

BODEN

2.5 G CS2 2TS

2.5 G CS1 2TS

2.5 G CS2 1TS

2.5 G CS1 1TS

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Times of transmission

Time of transmission (sec)

1405

21587

373

7560

14440

1750 781

33255

37923

308474

7290

1262553

4876

591 264

1123012806

104

TmaxTmin

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Coverage and availability

• GPRS coverage is guaranteed in all the trials sites (Barcelona city in Spain, Lulea region in Sweden, Enschede centre in the Netherlands and Duisburg region in Germany).

• UMTS coverage is not guaranteed because european 3G operators haven’t launched commercial UMTS services.

• Telia and TME intention is to provide UMTS test beds but they can´t guarantee their availability in the location of the trial sites during the project.

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Reliability

Several tests have been achieved over O2, TME and Telia GPRS networks in order to measure the reliability of GPRS networks in the project:– Measurements of TCP/UDP performance over the O2 (The

Netherlands) and TME (Spain) GPRS networks• TCP (Transport Control Protocol) suitable for BAN control data from

the end-host to the BAN

• UDP (User Data Protocol) suitable for sending BAN data (assuming some data loss)

• The performance of nowadays' GPRS networks might be sufficient to meet the data rates needed in 90 % of the MobiHealth trials

– Meaurements of throughput and latency over the Telia (Sweden) GPRS network: It is necessary to develop network aware applications that can adapt to the latency by deploying appropriate buffering schemes.

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Traffic management

• Data transmission has priority over voice transmission in data dedicated channels.

• The number of physical channels used for packet data traffic depends on the data traffic congestion and the voice traffic.

• Depending on the number of dedicated channel in the trial location, the traffic congestion and the voice traffic, the data traffic offered by the operators involved in the trials will be affected.

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Security• Two security services are required to guarantee the confidentiality of

patient information:

– Data Confidentiality to protect the transmitted patients data from unwanted access.

– User and server authentication to ensure the identity of the patients sending the data and the server that is receiving the data.

• Two different security protocols will be used in the path from the BAN to the server:

– Transport Layer SSL connection, with data encryption and X.509 certificates-based client and Server authentication.

– Data link layer level security provided by the GPRS Radio Access Network, with terminal authentication and data encryption.

• Several tests of the performance of security packages for the MBU have been achieved over the TME GPRS network.

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Mobility

• Roaming functionality allows the users to establish GPRS connections from a foreign country according to the roaming agreement.

• If the user roams to another network during a GPRS connection, the link goes down.

• In the same network, handovers don't produce any disconnection.

• Regarding to UMTS, network operators in general don’t expect to support roaming functionality in their first phase.

• UMTS handover could be supported.

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Conclusions

• GPRS services are fully available in all the trial scenarios locations (Barcelona city in Spain, Lulea region in Sweden, Enschede centre in the Netherlands and Duisburg region in Germany).

• The current situation of UMTS is not suitable for a complete evaluation of medical applications because only test beds, short periods of trials and prototype terminals can be achieved.

• The technical requirements of the trial scenarios related to bandwidth, coverage, availability, reliability, traffic management, security, and mobility can be fulfilled by the nowadays GPRS technology.