The Unlicensed National Information Infrastructure (U-NII) radio band is part of the radio frequency spectrum used by IEEE-802.11a devices and by many wireless ISPs. A band is a small section of the spectrum of Radio communication frequencies, in which channels are usually used or set aside for the same Radio frequency ( RF) is a Frequency or rate of Oscillation within the range of about 3 Hz to 300 GHz IEEE 80211a-1999 or 80211a, is an amendment to the IEEE 80211 specification that added a higher throughput of up to 54 Mbit/s by using the 5 GHz It operates over three ranges:
- U-NII 1:
- 5. 15-5. 25 GHz. Sometimes referred to as U-NII Indoor. Regulations require use of an integrated antenna.
- 5. 25-5. 35 GHz. Sometimes referred to as U-NII Low. Regulations allow for a user-installable antenna.
- U-NII 2: 5. 47-5. 725 GHz. Both outdoor and indoor use, subject to Dynamic Frequency Selection (DFS, or radar avoidance)
- U-NII 3: 5. In TDMA and FDMA based cellular radio systems and wireless networks channel allocation schemes are required to allocate channels to base stations and access points 725 to 5. 825 GHz. Sometimes referred to as U-NII / ISM due to overlap with the ISM band. The industrial scientific and medical (ISM Radio bands were originally reserved internationally for the use of RF electromagnetic fields for industrial scientific and medical Regulations allow for a user-installable antenna.
Wireless ISPs generally use 5. 725-5. 825 GHz.
U-NII is an FCC regulatory domain for 5- GHz wireless devices. U-NII power limits are defined by the United States CFR Title 47 (Telecommunication), Part 15 - Radio Frequency Devices, Subpart E - Unlicensed National Information Infrastructure Devices, Paragraph 15. The Code of Federal Regulations (CFR is the codification of the general and permanent rules and regulations (sometimes called administrative law) published in the 407 - General technical requirements. Regulatory use in individual countries may differ.
The European HiperLAN standard operates in the U-NII band. HiperLAN (HIgh PErformance Radio LAN is a Wireless LAN standard
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Sources
- 15.07.2005, Heise: 5 GHz WLAN to be available all over Europe Citat: ". . . Today, the European Commission resolved in Brussels to regulate two blocks in the 5 GHz range (5150-5350 MHz and 5470-5725 MHz) for all of Europe. . . "
- Cisco: Glossary
See also
References
External links
- In the USA, CFR Title 47 Part 15 (revised in 2005) describes the regulation of the U-NII bands. In the US, Part 15 is an often-quoted section of Federal Communications Commission (FCC rules and Regulations mainly regarding un Licensed The industrial scientific and medical (ISM Radio bands were originally reserved internationally for the use of RF electromagnetic fields for industrial scientific and medical IEEE 80211 is a set of standards for wireless local area network (WLAN computer communication developed by the IEEE LAN/MAN Standards Committee ( IEEE 802 The Code of Federal Regulations (CFR is the codification of the general and permanent rules and regulations (sometimes called administrative law) published in the
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