SAA, 1st version - Net!Works

eMobility – Strategic Applications AgendaAnnex BThis project addressed the full current range of wireless communications technologies, from 5.8 GHz for shortrange vehicle links to VHF and point-to-point microwave.http://www.dft.gov.uk/162259/165240/244921/326557/327187/14wp300.pdfTrials report:http://www.dft.gov.uk/162259/165240/244921/326557/327187/14trep.pdfUMTC system background and other projects:http://iht.org.uk/publications/network/downloads/UTMCboundininsert.pdfLegal, Regulatory and institutional issuesSupplierThere is a possible licensing issue with wireless systems, even when the application was primarily forpublic service use (e.g. passenger information systems). If the system as implemented also providedprivate operators with information having a commercial benefit, even if only incidental, then this mayimpact on licensing of the service. The RA indicated that this was a complex issue and would requirefurther study to determine if a ―third party service‖ was being provided.Technical issuesSupplierThe area of most concern was the high number of CRC errors that occurred during the communicationssession. Subsequent investigations suggest that there is a problem with the way the protocol stackhandles the radio link. However, resolution of this problem would require further investigation.All data communications between the UTMC14 Workstation and the Beacon were carried via a PSTN dialup line and a 458 MHz point-to-point UHF radio link connected in series. Data not passed efficiently insome instances.The integration of wireless and wire-line implemented for the trial was effective although fairly crude innature. This particular integration issue will have a major impact on the architecture and implementationof UTMC Communications and needs also to be considered in general terms.The Bit Error Rate performance was never satisfactorily measured in basic performance terms at anytime in the trial.Buses: the basic lack of infrastructure for additional cabling in the vehicles made it difficult to achieve aneat installation with concealed cables. This is an issue that needs to be addressed by the industry as awhole.DemandRadio modem suffered from overheating due to being placed next to heat sources.ParticipantsLeicester City CouncilArriva Fox County LtdQ-Free ASASiemens Traffic Controls LtdLead PartnerHoward Humphreys Transport PlanningResults - What Happened Next?The technical framework established within UTMC-14 was incorporated into the national UTMC TechnicalSpecification. Key guidance, such as the use of licensed spectrum and the approach to IP networking overconstrained bearers with UDP rather than TCP, has influenced a number of traffic management systems aroundthe country since then.173