Frequency allocation

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US frequency allocations chart, 2011

Frequency allocation (or spectrum allocation) is the division of the electromagnetic spectrum into radio frequency bands. This spectrum management is regulated by governments in most countries.[1] Radio propagation does not stop at national boundaries. Giving technical and economic reasons, governments have sought to harmonise the allocation of RF bands and their standardization.

ITU definition[edit]

The International Telecommunication Union[2] – defines frequency allocation as being of "a given frequency band for the purpose of its use by one or more terrestrial or space radiocommunication services or the radio astronomy service under specified conditions".

Frequency allocation is also a special term, used in national frequency administration. Other terms are:

ITU-terms pertaining to frequency regulation
Frequency
distribution to:
ITU languages ITU RR
(article)
French English Spanish Arabic Chinese Russian
Radiocommunication services attribution
(attribuer)
allocation
(to allocate)
attribucion
(attribuir)
распределение
(распределять)
1.16
Regions or countries allotisement
(allotir)
allotment
(to allot)
adjudication
(adjudicar)
выделение
(выделять)
1.17
Radio stations assignation
(assigner)
assignment
(to assign)
asignacion
(assignar)
присвоение
(присваивать)
1.18

Bodies[edit]

A number standards bodies work on standards for frequency allocation, including:

In order to improve harmonisation in spectrum utilisation, the majority of service-allocations stipulated in this document[clarification needed] were incorporated in national Tables of Frequency Allocations and Utilisations which is with-in the responsibility of the appropriate national administration. The allocation might be primary, secondary, exclusive, and shared.

  • primary allocation: is indicated by writing in capital letters (see example below)
  • secondary allocation: is indicated by small letters
  • exclusive or shared utilization: is within the responsibility of administrations

However, military usage, in bands where there is civil usage, will be in accordance with the ITU Radio Regulations. In NATO countries military mobile utilizations will be in accordance with the NATO Joint Civil/Military Frequency Agreement (NJFA).

Example[edit]

Allocation to services
     Region 1           Region 2           Region 3     
135.7–137.8 kHz
FIXED
MARITIME MOBILE
Amateur
135.7–137.8 kHz
FIXED
MARITIME MOBILE
Amateur
135.7–137.8 kHz
FIXED
MARITIME MOBILE
RADIONAVIGATION
Amateur

See also[edit]

References[edit]

  1. ^ Haim, Mazar (2008-08-01). An Analysis of Regulatory Frameworks for Wireless Communications, Societal Concerns and Risk: The Case of Radio Frequency (RF) Allocation and Licensing (PDF). Middlesex University. 
  2. ^ ITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.16, definition: allocation (of a frequency band)

External links[edit]