INTERNATIONAL TELECOMMUNICATION UNION
RADIOCOMMUNICATION
STUDY GROUPS
Document 8A/TEMP/144-E
27 September 2005
English only
Working Party 8A
WORKING DOCUMENT TOWARDS A PRELIMINARY DRAFT NEW
RECOMMENDATION [METH.SHAR.LMS] ON METHODOLOGIES FOR SHARING
STUDIES RELATED TO SYSTEMS IN THE LAND MOBILE SERVICE
-R M.1461
The ITU Radiocommunication Assembly,
considering
a)
that the technical characteristics of systems in the land mobile service can vary;
b)
that the some public protection systems exists in the land mobile service;
c)
that some ITU-R technical groups are considering the potential for the introduction of new
types of systems or services in the bands used by the land mobile service;
d)
that representative technical and operational characteristics of systems operating in bands
allocated to the land mobile service are required to determine the feasibility of introducing new
types of systems;
e)
that procedures and methodologies are needed to analyse compatibility between systems
operating in the land mobile service and systems in other services,
recommends
1
that the methodologies in Annex 1 provide guidance for sharing studies between systems in
the land mobile service systems in other services;
2
that those land mobile system characteristics contained in appropriate ITU-R
Recommendations be used for the system under study.
Attention: The information contained in this document is temporary in nature and does not necessarily represent material that has been agreed by the
group concerned. Since the material may be subject to revision during the meeting, caution should be exercised in using the document for the
development of any further contribution on the subject.
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Annex 1
Methodologies for sharing related to systems operating
in the land mobile service
1
Introduction
2
Minimum desirable characteristics
[Editor’s Note: Land mobile service characteristics recommendations should at least contain these
minimum desirable characteristics]
General
System Wide
Frequency Band (MHz)
Channel Bandwidth (kHz)
Type of emission
Modulation Type
Duplex method
Type of deployment
Typical BER or SINAD
Transmitter
Receiver
Output Power (W)
Noise figure (dB)
ERP (dBW)
IF Filter Bandwidth (kHz)
Necessary bandwidth (kHz)
Sensitivity (dBm)
Antenna gain (dBd)
Antenna gain (dBd)
Antenna height (m)
Antenna height (m)
Radiation pattern
Radiation pattern
Antenna polarization
Antenna polarization
Depending on the type of systems, additional desirable characteristics for sharing studies include:
–
Cell size or coverage area
–
Antenna type
–
Downtilt angle
–
Feeder Loss (if not already included in the antenna gain)
–
Access technique
–
Data rates
–
Protection ratio
3
Sharing between land mobile systems and systems of other services
4
Sharing between different land mobile systems
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