1. doc.: IEEE 802.19-09/0034r3 Submission June 2009 Haiguang Wang, Shulan Feng, Jinnan LiuSlide 1 Media Independent Coexistence for Devices in TV White Spaces Notice: This document has been prepared to assist IEEE 802.19. 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 802.19. Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures, 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 802.19 TAG. If you have questions, contact the IEEE Patent Committee Administrator at.http:// ieee802.org/guides/bylaws/sb-bylaws.pdfpatcom@ieee.org Date: 2009-07-10 Authors: NameCompanyAddressPhoneE-mail Haiguang Wang Hisilicon, Huawei KuiKe Building, No.9 Xinxi Rd. Shang- Di, Hai-Dian District, Beijing P.R.China +86 10 82336600 wanghaiguang@ huawei.com Shulan FengHisilicon, Huawei KuiKe Building, No.9 Xinxi Rd. Shang- Di, Hai-Dian District, Beijing P.R.China +86 10 82336600 fengsl@huawei.c om Jinnan LiuHisilicon, Huawei KuiKe Building, No.9 Xinxi Rd. Shang- Di, Hai-Dian District, Beijing P.R.China +86 10 82336600 liujinnan@huaw ei.com

2. doc.: IEEE 802.19-09/0034r3 Submission June 2009 Haiguang Wang, Shulan Feng, Jinnan Liu Slide 2 Abstract This contribution propose to use a Media Independent Coexistence mechanism to solve the coexistence of the heterogeneous devices in TV White Spaces. We propose to use a centralized spectrum manager to manage the spectrum. We 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.

3. doc.: IEEE 802.19-09/0034r3 Submission 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 June 2009 Slide 3 Haiguang Wang, Shulan Feng, Jinnan Liu

4. doc.: IEEE 802.19-09/0034r3 Submission A generic co-existence scenarios for TV White Space Networks/Devices [1] June 2009 Haiguang Wang, Shulan Feng, Jinnan Liu Slide 4

5. doc.: IEEE 802.19-09/0034r3 Submission Observations The coexistence issue is quite complex in the TV White Spaces as so many devices may co-located in the same places. We should consider to solve the generic coexistence scenario specified in previous slides step-by-step. June 2009 Slide 5 Haiguang Wang, Shulan Feng, Jinnan Liu

6. doc.: IEEE 802.19-09/0034r3 Submission Steps to Solve Coexistence Issues Step 1: 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. Step 2: Coexistence among devices only with spectrum sensing capability. –FCC allow this type of device to use the spectrum, but need pass the FCC test. Currently there is no such device available yet. Step 3: Coexistence among fixed, portable and spectrum sensing only devices. Haiguang Wang, Shulan Feng, Jinnan Liu Slide 6

7. doc.: IEEE 802.19-09/0034r3 Submission Possible Coexistence Mechanisms Time Division Multiplexing (TDM) –802.16h: coexist of 802.16 and 802.11 –May have difficulties to coexist with standards defined in the future. Frequency Division Multiplexing (FDM) –A possible direction. –We can consider to further divide the 6 MHz channels into narrower bands such as 1MHz or 2 MHz? Code Division Multiplexing (CDM) –Seems not a applicable as significant changes are required at physical layer. Haiguang Wang, Shulan Feng, Jinnan Liu Slide 7

8. doc.: IEEE 802.19-09/0034r3 Submission Media Independent Coexistence (MIC) MIC –Proposed by in March by Carlos and Joe [2]. –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 Haiguang Wang, Shulan Feng, Jinnan Liu Slide 8

9. doc.: IEEE 802.19-09/0034r3 Submission Critical Issues to Solve before Using MIC Mechanism Allowing to use centralized spectrum manager. Supporting flexible bandwidth by individual standard. Identifying the neighboring devices. –Can we require each device reporting parameters of their radios and find the interference range of each radio? Define a common protocol for spectrum management Define a spectrum contention mechanism –That can be used at the centralized spectrum manager for spectrum contention.

10. doc.: IEEE 802.19-09/0034r3 Submission Advantages FDM is an universal coexistence mechanism. Can easily coexist the protocols designed in the future as long as they support flexible bandwidth defined by the coexistence mechanism. Interference among heterogeneous devices can be avoided. MIC can simplify the bandwidth contention mechanism.

11. doc.: IEEE 802.19-09/0034r3 Submission June 2009 Slide 11 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

12. doc.: IEEE 802.19-09/0034r3 Submission June 2009 Slide 12 References [1] Richard Paine, Mark Cummings, Alex Reznik, “White Space Coexistence Use Cases”, https://mentor.ieee.org/802.19/dcn/09/19- 09-0026-01-tvws-whitespace-coexistence-use-cases.doc, June 6, 2009.https://mentor.ieee.org/802.19/dcn/09/19- 09-0026-01-tvws-whitespace-coexistence-use-cases.doc [2] Juan Carlos Zunija, Joseph Kwak, “802.21 Media Independent Coexistence”, https://mentor.ieee.org/802-sg-whitespace/dcn/09/sg- whitespace-09-0032-04-0000-802-21-media-independent- coexistence.ppt, March 12, 2009https://mentor.ieee.org/802-sg-whitespace/dcn/09/sg- whitespace-09-0032-04-0000-802-21-media-independent- coexistence.ppt Haiguang Wang, Shulan Feng, Jinnan Liu