Dear all
I suggested adding a mention of regulatory constraints in the
draft-ietf-lwig-terminology-03. For example in Europe ETSI standard EN
300 220-1 imposes duty cycle constraints on operation in the 873-870MHz
band.
As it happens this is a practical concern of the UK smart meter
programme. They are considering the merits of sub-GHz operation but are
concerned about violating the duty cycle constraints, which are 1% or
0.1% depending on frequency. Apparently the new IEEE 802.15.4g PHY
options are written around US regulations and may not map onto European
constraints where duty cycle must be met.
This happens to be an interest of mine: how to get the improved range of
the 863-870MHz band (vs a vis 2.4GHz) while still adhering to IEEE
standards and not violating power and duty cycle regulations. It would
be possible to select a combination of PHY parameters from IEEE
802.15.4g and one or other MAC implementation (e.g. from 802.15.4e) to
produce workable solutions for low power wireless networks, but without
coordination that riases the likelihood of a proliferation of
standards-compliant implementations such that offerings from different
suppliers will not interoperate.
One appoach might be to keep an eye on what the UK smart meter programme
is doing, and follow that, but their progress is very slow, and they
seem to be interested in providing just a new PHY and MAC on which to
operate Zigbee SE1.x.
Perhaps there are others in this group who have thoughts on this, or
knowledge of current or future implementations?
--
Regards - Charles Palmer
Project Hydra Project Manager - Acute Technology Limited
Woodthorpe, Calver Road, Baslow, Derbyshire, DE45 1RR, United Kingdom
Mob: +44 (0)7977 577 627 Skype: Acutetech
Email: [email protected] Web: http://projecthydra.info
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