1. Media Independent Coexistence for Devices in TV White Spaces
June 2009
Media Independent Coexistence for Devices in TV White Spaces
Date:
Authors:
Name
Company
Address
Phone
Haiguang Wang
Hisilicon, Huawei
KuiKe Building, No.9 Xinxi Rd. Shang-Di, Hai-Dian District, Beijing P.R.China
Shulan Feng
Jinnan Liu
Notice: This document has been prepared to assist IEEE It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.
Release: The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE
Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures < ieee802.org/guides/bylaws/sb-bylaws.pdf>, including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard." Early disclosure to the TAG of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that the draft publication will be approved for publication. Please notify the Chair as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE TAG. If you have questions, contact the IEEE Patent Committee Administrator at
Haiguang Wang, Shulan Feng, Jinnan Liu
Apurva N Mody (BAE Systems), Ranga Reddy (US Army)

2. June 2009
Abstract
This contribution propose a to use Media Independent Coexistence mechanism to solve the coexistence of the heterogeneous devices in TV White Spaces. We also propose to consider the possibility of further dividing the 6MHz TV Channels into more sub-channels. Heterogeneous devices can be put in different sub-channels. This can avoid the interference among heterogeneous devices in TV White Space efficiently. It is suitable for the coexistence of fixed and portable devices.
Haiguang Wang, Shulan Feng, Jinnan Liu
Apurva N Mody (BAE Systems), Ranga Reddy (US Army)

3. Possible Networks/Devices in TV White Space
June 2009
Possible Networks/Devices in TV White Space
WRAN
4W with database access
802.22/802.16/non-802
Cellular
100mW to 4W with database access
802.16/non-802
Wi-Fi/Femto cell equipment
100mW or 40mW with database access
802.11/non-802
PAN/BAN
50mW with spectrum sensing only capability.
802.15/non-802
Wireless Microphone
May use white space
Slide 3
Haiguang Wang, Shulan Feng, Jinnan Liu

4. A generic co-existence scenarios for TV White Space Networks/Devices
June 2009
A generic co-existence scenarios for TV White Space Networks/Devices
Slide 4
Haiguang Wang, Shulan Feng, Jinnan Liu

5. June 2009
Observations
The coexistence issue is quite complex in the TV White Spaces as so many devices may co-located in the same places.
Proposed mechanism should at least be able to solve the generic coexistence scenario specified in previous slides.
An extreme case is that only one spare TV channel is available.
Slide 5
Haiguang Wang, Shulan Feng, Jinnan Liu

6. Classifications of the Coexistence Issues
Coexistence among fixed and portable devices.
Fixed and portable type II devices can access the database via Internet
They can also provide geo-location information.
Portable type I devices are under the control of portable type II/fixed devices.
Coexistence among devices only with spectrum sensing capability.
Coexistence among fixed, portable and spectrum sensing only devices.
Slide 6
Haiguang Wang, Shulan Feng, Jinnan Liu

7. Classify the Possible Coexistence Mechanisms
Time Division Multiplexing (TDM)
802.16h: coexist of and
Spectrum may not be full utilized as different standard has different spectrum policy.
802.16: minimum bandwidth 1.25 MHz
802.11: minimum bandwidth 5 MHz
Frequency Division Multiplexing (FDM)
A possible direction.
Should we consider further divide the 6 MHz channels into narrow bands such as 1MHz or 1.25 MHz?
Code Division Multiplexing (CDM)
Seems not a applicable as significant changes are required at physical layer.
Slide 7
Haiguang Wang, Shulan Feng, Jinnan Liu

8. Media Independent Coexistence (MIC)
Proposed by in March
Manages the spectrum via higher layer transport protocols.
Suitable for the coexistence of fixed and portable devices.
Consider the possibility of adding in a spectrum manager and helping the spectrum allocation.
Accept spectrum request from TVBDs.
Allocate spectrums according to the request and information from database. The information can be geo-location, interference range of devices etc.
Consider to further divide a TV channel into more sub-channels
Devices belong to the same standard can use the same sub-channel.
Devices belong to different standard use the different sub-channels. No interference among heterogeneous devices
Slide 8
Haiguang Wang, Shulan Feng, Jinnan Liu

9. Month Year
doc.: IEEE yy/xxxxr0
June 2009
Conclusions
In this proposal, we propose to use Media Independent Coexistence and Frequency Division Multiplexing mechanism to solve the coexistence issue in the TV White Spaces. The advantages of this method is the interference among heterogeneous devices can be fully avoided.
Haiguang Wang, Shulan Feng, Jinnan Liu
John Doe, Some Company

10. Month Year
doc.: IEEE yy/xxxxr0
June 2009
References
[1] Richard Paine, Mark Cummings, Alex Reznik, “White Space Coexistence Use Cases”, June 6, 2009.
[2] Juan Carlos Zunija, Joseph Kwak, “ Media Independent Coexistence”, March 12, 2009
Haiguang Wang, Shulan Feng, Jinnan Liu
John Doe, Some Company