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Sub 1 GHz license-exempt operation

This paper discusses the current lack of standardization for Sub-1GHz operations, particularly in the 902-928 MHz ISM band, within the IEEE 802.11 framework. It highlights advantages such as improved range and battery life over traditional higher frequency bands, while acknowledging bandwidth limitations. The authors advocate for the integration of existing IEEE 802.11 PHY technologies to enable rapid deployment of solutions in outdoor SmartGrid applications. Additionally, they call for standardization efforts similar to IEEE 802.11y to facilitate channelization and effective usage of Sub-1GHz frequencies.

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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 11-10-0001-04-0wng-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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