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Content for  TR 43.030  Word version:  16.0.0

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1  ScopeWord‑p. 6

The present document is a descriptive recommendation to be helpful in cell planning.

1.1  References

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
  • References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
  • For a specific reference, subsequent revisions do not apply.
  • For a non-specific reference, the latest version applies.
[1]
GSM 01.04: "Digital cellular telecommunications system (Phase 2+); Abbreviations and acronyms".
[2]
TS 45.002: "Digital cellular telecommunications system (Phase 2+); Multiplexing and multiple access on the radio path".
[3]
TS 45.005: "Digital cellular telecommunications system (Phase 2+); Radio transmission and reception".
[4]
TS 45.008: "Digital cellular telecommunications system (Phase 2+); Radio subsystem link control".
[5]
CCIR Recommendation 370 5: "VHF and UHF propagation curves for the frequency range from 30 MHz to 1000 MHz".
[6]
CCIR Report 567 3: "Methods and statistics for estimating field strength values in the land mobile services using the frequency range 30 MHz to 1 GHz".
[7]
CCIR Report 842: "Spectrum conserving terrestrial frequency assignments for given frequency distance seperations".
[8]
CCIR Report 740: "General aspects of cellular systems".
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1.2  Abbreviations

Abbreviations used in the present document are given clause 6 (Glossary) and in GSM 01.04 [1].

2  Traffic distributions

2.1  Uniform

A uniform traffic distribution can be considered to start with in large cells as an average over the cell area, especially in the country side.

2.2  Non uniform

A non uniform traffic distribution is the usual case, especially for urban areas. The traffic peak is usually in the city centre with local peaks in the suburban centres and motorway junctions.
A bell shaped area traffic distribution is a good traffic density macro model for cities like London and Stockholm. The exponential decay constant is on average 15 km and 7,5 km respectively. However, the exponent varies in different directions depending on how the city is built up. Increasing handheld traffic will sharpen the peak.
Line coverage along communication routes as motorways and streets is a good micro model for car mobile traffic. For a maturing system an efficient way to increase capacity and quality is to build cells especially for covering these line concentrations with the old area covering cells working as umbrella cells.
Point coverage of shopping centres and traffic terminals is a good micro model for personal handheld traffic. For a maturing system an efficient way to increase capacity and quality is to build cells on these points as a complement to the old umbrella cells and the new line covering cells for car mobile traffic.
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