Sensing Manager Authors: IEEE P802.22 Wireless RANs Date: 2008-01-11 Notice: This document has been prepared to assist IEEE 802.22. 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 802.22. Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures http://standards.ieee.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 Working Group 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 Carl R. Stevenson 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 802.22 Working Group. If you have questions, contact the IEEE Patent Committee Administrator at patcom@iee.org. > Liu Jinnan Huawei Hisi

ABSTRACT We give a contribution about unsolved functions in Spectrum Manager and propose Sensing Manager to implement those functions. Liu Jinnan Huawei Hisi

The functions of Spectrum Manager at BS may include: Background The functions of Spectrum Manager at BS may include: Data collection and fusion [1] Channel management [1] [2] Self-coexistence and spectrum sharing [1] [2] Control of spectrum sensing [2] TPC [2] Liu Jinnan Huawei Hisi

Self-coexistence and spectrum sharing Previous Work Channel manager Channel classification Channel switch procedure (with backup channel) Self-coexistence and spectrum sharing CBP Spectrum sharing mechanism Exchange measurement report in overlap area [3] TPC Liu Jinnan Huawei Hisi

To do the unsolved functions of Spectrum Manager in previous works Sensing Manager Sensing Manager To do the unsolved functions of Spectrum Manager in previous works Data collection and fusion Channel Set Status (without backup channel) Control of Spectrum sensing Channel set status dissemination Liu Jinnan Huawei Hisi

Functions of Spectrum Manager Incumbent History is a static record to reflect incumbent occupancy from historical data of one month/year of sensing results and incumbent database. Data collection Sensing manager would collect information from Geolocation, SSF, Incumbent History, Incumbent Database, Operator and Regulation. Channel information related with current WRAN system and neighbor WRAN systems may be obtained from channel manager and coexistence manager respectively. Data fusion Firstly, to fuse same signal source from different data sources, and to distinguish different signal sources from same or different data sources. And then, to store the multiple signal sources, even in one channel. Finally, to form a channel set status. Data dissemination According to the channel set status, channel manager would do channel switching ,such as operation channel switching or backup channel maintaining. While coexistence manager would share spectrum with neighbor WRAN, for example , borrowing channel from neighbor WRAN. And Power control manager would control transmit power by sensing manager’s assignment. Sensing Manager also would schedule dynamic sensing based on channel set status. Liu Jinnan Huawei Hisi

Data collection and fusion How to fuse? Is it possible that the same channel is occupied by different signal sources at same time? Yes (location dependent ) Is it beneficial to distinguish interfered status from occupied status ? Yes( the interfered status is related with the occupied status, not independent ) sys2 sys1 WRAN BS Case1 : Both sys1 and sys2 work on channel K Case 2: Sys1 works on channel K, and sys2 works on channel K-1 but channel K is constrained. Case 3:Sys1 works on channel K, and sys2 works on channel K-1 but channel K is non-constrained Liu Jinnan Huawei Hisi

Proposed rules for data fusion One channel would be saved as multiple channel statuses which are related with different signal sources different signal type (signal type known) different location The channel status distinguishes “interfered” status from other channel statuses. High (such as Co-channel) Media (such as IM) Others (such as non-identification signal ) Liu Jinnan Huawei Hisi

Disallowed (quasi- static) Forbidden Occupied by incumbent Allowed (dynamic) Occupied (by incumbents, current WRAN, Neighbor WRANs) Interfered Free backup channel others Selected by channel manager maintain by Sensing manager Liu Jinnan Huawei Hisi

Control of Spectrum sensing To confirm channel status for double check To maintain the channel status list Dynamic sensing [4] The status of Interfered channel is dependent on the occupied status. If the signal source release the occupied status, the status of interfered channel would be changed. So we mention dynamic sensing about occupied channel instead of interfered channel plus occupied channel. Liu Jinnan Huawei Hisi

Channel set status dissemination Channel manager Backup channel selection Coexistence manager Spectrum sharing Power Control manager Power constraints Liu Jinnan Huawei Hisi

Conclusion To build a channel status list with multiple signal sources in one channel To avoid confusion, different signal sources would be stored respectively instead of fusion as one signal source in one channel. To distinguish “interfered “ status To decrease measurement resource consumption, the interfered status refreshes channel status according to occupied status WRAN may take usage of interfered channel with acceptable interference Liu Jinnan Huawei Hisi

References [1] IEEE 802.22-07/0457-r0 Outline of Sec9 , Sept. 2007 [2] IEEE 802.22-07/0456r1 Spectrum Manager 9.1, Sept. 2007 [3] IEEE 802.22-07/0316r0 Forward Coexistence Measurement Report To Neighbor, July, 2007 [4] IEEE 802.22-07/0412r0 Dynamic sensing, Sept. 2007 Liu Jinnan Huawei Hisi