FIN-10-0064-D E Final Report Appendices Part 2...FIN-10-0064-D_E Appendices (Part 2) 2 30 April 2010...

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Not-spots researchImpacts, causes and potential solutions for areas of poor coverage, not-spots

Appendices (Part 2) FIN-10-0064-D_E Appendices (Part 2)

30 April 2010

FIN-10-0064-D_E Appendices (Part 2) 1 30 April 2010

Contents

Appendix C: Site Criteria and summary of characteristics (Part 2) 2

C.17 Train routes 2


Appendix C: Site Criteria and summary of characteristics (Part 2) The corresponding measurements and analyses for study sites in towns and villages are provided in a separate appendix (part 1).

C.17 Train routes Map scales are such that only gross effects are seen; call failure statistics are in the main report.

C.17.1 East coast mainline - 2G coverage

The figures shows 2G coverage is patchy along the east coast mainline, with most operators showing multiple areas of poor coverage (indicated in blue), even at this scale where only gross effects are seen. The measurements are taken inside the train so that areas of red indicate that it should be possible to sustain a call in those areas.


Good indoor coverage Poor outdoor coverageMid-range coverageKey: Good indoor coverage Poor outdoor coverageMid-range coverageKey:

Minimal observed power


Minimal observed powerMinimal observed power

Figure 1: Snapshot of 2G coverage between London and Edinburgh for operator A and B






Figure 2: Snapshot of 2G coverage between London and Edinburgh for operator C and D


The measurements have been repeated several times on different trains. Figure 3 provides one example showing the repeatability. There is a good degree of consistency in the coverage bands (the different spacing of data points just reflects the speed of the train in different directions).

Figure 3: Illustration of a repeat measurement for one operator (southbound then northbound) around Huntingdon

C.17.2 East coast mainline - 3G coverage

Signal strength requirements for data transmission are more complex than for voice signal and, simplistically, depend on data rate and number of users. The measurement bands of CPICH power provide an indication of the ability to provide a basic service (red signal i.e. reliable voice coverage) to higher capacity signal (silver banding - 10 times higher rate than voice).

The following figures show there is relatively little 3G coverage along the east coast mainline - with just one operator providing a strong signal along virtually the whole route; coverage from a second is almost continuous, especially when the tolerance of data communications to short interruptions is considered. However one operator's coverage is good (i.e. mainly silver in the snapshots) suggesting good data rates can be expected.







Figure 4: Snapshot of 3G coverage between London and Edinburgh for operators F and G






Figure 5: Snapshot of 3G coverage between London and Edinburgh for operators H and I






Figure 6: Snapshot of 3G coverage between London and Edinburgh for operator J


C.17.3 West coast mainline - 2G coverage

The figures shows 2G coverage is generally excellent along the west coast mainline, with most operators showing extensive areas of high signal level (indicated in silver),. The measurements are taken inside the train so that areas of red indicate that it should be possible to sustain a call in those areas.

(Map scales are such that only gross effects are seen; call failure statistics are in the main report.)





Figure 7: Snapshot of 2G coverage between London and Glasgow for operators A and B






Figure 8: Snapshot of 2G coverage between London and Glasgow for operators C and D


C.17.4 West coast mainline - 3G coverage

Signal strength requirements for data transmission are more complex than for voice signal and, simplistically, depend on data rate and number of users. The measurement bands of CPICH power provide an indication of the ability to provide a basic service (red signal i.e. reliable voice coverage) to higher capacity signal (silver banding - 10 times higher rate than voice).

The following figures show one operator provides good 3G coverage along most of the line (shown in silver) but that from the others is limited in many places (areas of blue or black). The measurements were taken inside the train so that the signal strength should be sufficient in areas shown in red for a call to be sustained.





Figure 9: Snapshot of 3G coverage between London and Glasgow for operators F and G






Figure 10: Snapshot of 3G coverage between London and Glasgow for operators H and I






Figure 11: Snapshot of 3G coverage between London and Glasgow for operator J


C.17.5 Edinburgh to Glasgow - 2G coverage

A small amount of trial data was collected between Edinburgh and Glasgow in a preliminary measurement. The figures suggest that there are many areas of poor 2G coverage along the route between Edinburgh and Glasgow, with most operators showing multiple patches of low signal level (indicated in blue). The measurements are taken inside the train so that areas of red indicate that it should be possible to sustain a call in those areas.

Operator C Operator D

Operator A Operator B

Operator C Operator D

Operator A Operator B

Figure 12: Snapshot of 2G coverage between Edinburgh and Glasgow for all operators



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FIN-10-0064-D E Final Report Appendices Part 2...FIN-10-0064-D_E Appendices (Part 2) 2 30 April 2010...

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