1. Comments on Sub 1 GHz license-exempt operation
Month Year
doc.: IEEE /0204r3
April 2010
Comments on Sub 1 GHz license-exempt operation
Date:
Authors:
David Halasz, Aclara
David Halasz, Aclara

2. Month Year
doc.: IEEE /0204r3
April 2010
Abstract
This presentation summarizes some of the comments received on the Sub 1 GHz license exempt PAR & 5c in submission 10/0001r5.
David Halasz, Aclara
David Halasz, Aclara

3. Comments on Sub 1 GHz license-exempt
April 2010
Comments on Sub 1 GHz license-exempt
The bands are not uniform across the world. Roaming users can cause issues.
Confusion between TVWS and Sub 1 GHz license-exempt
Issues with Annex I & J
Difference between IEEE g
Coexistance with IEEE g
Discuss bands in other countries
Discuss minimum data rates
Interoperability with IEEE g
David Halasz, Aclara

4. April 2010
The bands are not uniform across the world. Roaming users can cause issues.
Issue : A U.S. user roams to Europe. The user turns on the Sub 1 GHz wireless card and causes interference.
Suggestion : Add text in section 5.2 of PAR to indicate above discussions are within scope.
Note : World mode, IEEE d, can address this for mobile nodes.
5.2 Scope of Proposed Standard: This amendment defines standard operation and channelization of license-exempt frequency bands below 1 GHz for IEEE networks while meeting legal requirements across regulatory domains.
David Halasz, Aclara

5. Confusion between TVWS and Sub 1 GHz license-exempt
April 2010
Confusion between TVWS and Sub 1 GHz license-exempt
Issue A : Both PARs are concerned with Sub 1 GHz operation. However the rules are different.
Suggestion : Add text to section 7.1 and/or 8.1 of PAR mentioning the rules differences.
Note : TVWS PAR is 09/934.
David Halasz, Aclara

6. Confusion between TVWS and Sub 1 GHz license-exempt issue A cont.
April 2010
Confusion between TVWS and Sub 1 GHz license-exempt issue A cont.
7.1 Are there other standards or projects with a similar scope? Yes
Explanation: IEEE P addresses one product segment of the new regulatory rules.
Sponsor Organization: IEEE
Project/Standard Number: P g
Project/Standard Date:
Project/Standard Title: IEEE Standard for Information Technology - Telecommunications and Information Exchange Between Systems - Local and Metropolitan Area Networks - Specific Requirements - Part 15.4: Wireless Medium Access Control (MAC) and Physical Layer (PHY) Specifications for Low Rate Wireless Personal Area Networks (WPANs) - Amendment: Physical Layer(PHY) Specifications for Low Data Rate Wireless Smart Metering Utility Networks
Explanation: IEEE P802.11af addresses Television White Spaces, which are below 1 GHz.
Project/Standard Number: P802.11af
Project/Standard Title: Standard for Information Technology - Telecommunications and Information Exchange Between Systems - Local and Metropolitan Area Networks - Specific Requirements - Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications; Amendment: TV White Spaces Operation
David Halasz, Aclara

7. Confusion between TVWS and Sub 1 GHz license-exempt issue A cont.
April 2010
Confusion between TVWS and Sub 1 GHz license-exempt issue A cont.
8.1 Additional Explanatory Notes: (Item Number and Explanation)
7.1 Are there other standards or projects with a similar scope?
P802.11af limits itself to the TV White Space. This PAR is for other license-exempt bands below 1 GHz.
David Halasz, Aclara

8. Confusion between TVWS and Sub 1 GHz license-exempt
April 2010
Confusion between TVWS and Sub 1 GHz license-exempt
Issue B : Both PARs are concerned with Sub 1 GHz operation. Want to avoid completely different solutions.
Suggestion : Work towards common solutions.
Note : IEEE af has initial text.
David Halasz, Aclara

9. April 2010
Issues with Annex I & J
Issue A : Annex I/J doesn't cover all regulatory domains
Issue B : IEEE does not define regulatory domains. However implementations need this information.
Issue C : For changes above and management purposes, regulatory classes may need an update.
Suggestion : Handle above issues in TGmb
Note : Submission in 10/210r6 approved in TGmb
David Halasz, Aclara

10. Difference between IEEE 802.15.4g
April 2010
Difference between IEEE g
Issue : Confusion on how this work is different than IEEE g
Suggestion : Add text to 8.1 of PAR indicating IEEE g PAR limits data rate to less than 1 Mbit/s. The desire is for an IEEE PHY that scales to higher data rates.
8.1 Additional Explanatory Notes: (Item Number and Explanation)
7.1 Are there other standards or projects with a similar scope?
P g limits itself to below 1 Mbit/s. This PAR is for IEEE MAC and PHY that scale to higher data rates.
David Halasz, Aclara

11. Coexistance with IEEE 802.15.4g
April 2010
Coexistance with IEEE g
Issue : Want to avoid coexistance issues
Suggestion : Coordinate with IEEE g on coexistance.
Note A : In section of 10/0001 has the following text,
“The working group will create a CA document as part of the WG balloting process”
Note B : Currently, IEEE g has more than one PHY. So IEEE g should already be expecting coexistance work.
David Halasz, Aclara

12. Discuss bands in other countries
April 2010
Discuss bands in other countries
Frequency band in MHz
Government
1 MHz in Japan
China
Europe
U.S.
Japan
Reference [1]
David Halasz, Aclara

13. Discuss minimum data rates
April 2010
Discuss minimum data rates
Channel
Width
Clocking
Data rates in Mbits/S
20 MHz 1
54, 48, 36, 24, 18, 12, 9, 6
10 MHz
1/2
27, 24, 18, 12, 9, 6, 4.5, 3
5 MHz
13.5, 12, 9, 6, 4.5, 3, 2.25, 1.5
2.5 MHz
1/8
6.7, 6, 4.5, 3, 2.25, 1.5, 1.1, .75
1.25 MHz
1/16
3.4, 3, 2.3, 1.5, 1.1, .8, .6, .375
David Halasz, Aclara

14. Interoperability with IEEE 802.15.4g
April 2010
Interoperability with IEEE g
Ask if there was any submission
David Halasz, Aclara

15. April 2010
References
1) g TG4g PHY Technical Parameters Document (Beecher, Rolfe)
David Halasz, Aclara