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Sub 1 GHz license-exempt operation

Learn about the advantages and limitations of sub 1 GHz operation for IEEE 802.11, such as the 900 MHz ISM band, and how it can be used in outdoor environments. Explore the potential for standardization efforts and existing solutions.

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Sub 1 GHz license-exempt operation

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  1. Sub 1 GHz license-exempt operation Authors: Date: 2010-01-14 David Halasz, Aclara

  2. Abstract • IEEE 802.11 currently doesn’t standardize usage of sub 1 GHz operation, such as the 900 MHz ISM band. While these bands are limited, they are attractive for outdoor usage. David Halasz, Aclara

  3. Sub 1 GHz and IEEE 802.11 • Current IEEE 802.11 standard does not cover below 1 GHz, such as the 902-928 MHz ISM band. • This band does have an advantage over 2.4 GHz, 3.65 GHz and 5 GHz because of range per transmit power. • Better free space propagation loss • Better clutter propagation loss. i.e. trees, telephone poles • Increase in battery life • A disadvantage is the limited bandwidth. • However sufficient for 5, 10 and 20 MHz OFDM • Down to 1.25 MHz wide channel also useful • Smaller channels also allow for bandwidth sharing David Halasz, Aclara

  4. SmartGrid has a large outdoor component • Use IEEE 802.11! • Select band and channel width to meet the usage needs. David Halasz, Aclara

  5. Use existing IEEE 802.11 PHY for quick solutions • Solutions today with added down converter. • Possible future solutions similar to dual mode .11a/.11g WLAN cards. David Halasz, Aclara

  6. Standardization effort • Standardization effort should be similar to IEEE 802.11y. • IEEE 802.11y PAR approved 3/16/2006 • REVCOM Standards Board Approval 9/26/2008 • Efforts within IEEE 802.11j, .11k, .11y and current .11m will make this effort easier provided not a new PHY. • Channelization • Annex I, J of 802.11-2007 • Channel width down to 1.25 MHz • Clause 17, 20 David Halasz, Aclara

  7. PAR & 5 criteria • Draft for PAR and 5 criteria in document 11-10-0001-02-0wng-900mhz-par-and-5c.docx David Halasz, Aclara

  8. Motion from 08/762r5 Believing that the PAR and Five Criteria contained in the documents referenced below meet IEEE-SA guidelines, Request that the PAR contained in 10/0001r04 and the Five Criteria contained in 10/0001r04 be posted to the IEEE 802 Executive Committee (EC) agenda for WG 802 preview and EC approval to submit to NesCom. [Moved by <name> on behalf of <group> <group> vote: Moved: <name>, Seconded: <name>, Result: y-n-a] David Halasz, Aclara

  9. References • Policies and Procedures of IEEE project 802, LAN MAN Standards Committee (LMSC) http://ieee802.org/policies-and-procedures.pdf David Halasz, Aclara

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