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For an ISM band, perhaps the definition
should be in terms of equal sharing of the medium between different systems.
The systems and applications should be tolerant of the medium being shared. Regards, Eldad From: Shellhammer,
Steve [mailto:sshellha@xxxxxxxxxxxx] Craig,
I would say it is not so much as a “minimal” impact but a “tolerable”
impact. The 802.15.2 definition is targeted at that level, since it says
that the application can still perform its task. Another way of saying
it, is that the QoS performance meets an acceptable level of performance.
Thanks for commenting. Steve From: Craig Warren
[mailto:cwarren@xxxxxxxxxxxx] Hi Steve; Should there be some statement in here
like some minimal impact of the task being performed kind of wording? kindest regards; Craig From:
Shellhammer, Steve [mailto:sshellha@xxxxxxxxxxxx] 802.19 TAG,
Recently with the coexistence discussions regarding 802.11 VHT60 I have been
asked several times for a definition of coexistence. It was pointed out
at the closing EC meeting that one cannot evaluate coexistence without a proper
definition. I explained that the current definition that we have in 802
is the one that was standardized in 802.15.2 several years ago. The
802.15.2 recommended practice was approved by both 802.11 and 802.15.
Yesterday, Bruce Kraemer, the chair of 802.11, asked me if the 802.19 TAG
supported that definition. I have never asked the TAG that
question. So I thought I would send out an email on this question.
The definition in the 802.15.2 recommended practice is, 3.1.2 coexistence: The ability of one system to perform a task in a given shared
environment where other systems have an ability to perform their tasks and may
or may not be using the same set of rules.
I would like to hear feedback on this definition. The TAG could choose to
support this definition or come up with its own definition. There is a
perception that one cannot evaluate the coexistence of two wireless networks
without an agreed upon definition.
If the TAG decides they want to support another definition we could later hold
an email ballot on the definition if making it more formal is useful.
Comments are encouraged. Steve |