IEEE P802.22 Wireless RANs Date: 2009-1-08 January 2009 doc.: IEEE 802.22-09/0021r0 January 2009 Super-frame Structure for Spectrum Sharing and Inter-WRAN Communications IEEE P802.22 Wireless RANs Date: 2009-1-08 Author: 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. Wendong Hu, STMicroelectronics Wendong Hu, STMicroelectronics

January 2009 doc.: IEEE 802.22-09/0021r0 January 2009 Abstract This presentation describes a super-frame design for efficient inter-network spectrum sharing and inter-work communications in IEEE 802.22. This presentation is to (but is not limited to) address the following comments: 131, 132, 136, 149, 150. Wendong Hu, STMicroelectronics Wendong Hu, STMicroelectronics

Proposed Super-frame Structure January 2009 Proposed Super-frame Structure Wendong Hu, STMicroelectronics

Super-frame Control Header January 2009 Super-frame Control Header Format System Type: IEEE 802.22 WRAN Other common info… Header Check Sequence Contain common (the same) system information across all WRAN systems on the same channel Simultaneous transmissions of SCHs containg different header contents will results in SCH collisions. Transmitted simultaneously by all WRANs on the same channel Enable efficient WRAN detection/discovery Wendong Hu, STMicroelectronics

CBP PDU Three-symbol CBP PDU SCI format in a CBP PDU January 2009 CBP PDU Three-symbol CBP PDU CBP Preamble CBP Header Superframe Control Information (SCI) CBP IEs and other Payload SCI format in a CBP PDU System Type: IEEE 802.22 WRAN WRAN ID Frame Reservation MAP in the current super-frame Frame allocation for Data Services Frame allocation for Quiet Periods Self-coexistence Window (SCW) Reservation MAP Other Information Wendong Hu, STMicroelectronics

Coexistence Communications (Co-channel) January 2009 Coexistence Communications (Co-channel) WRANs use SCWs (reserved or random-access based) to exchange coexistence messages Negotiation for Frame allocation and SCW allocation for the next superframes Each WRAN BS uses its last RESERVED SCW to announce the latest negotiation decisions of BW (frame and SCW) allocations to CPEs within the WRAN cell. Wendong Hu, STMicroelectronics

January 2009 The “J” SCW The “J” SCW, which is the last SCW in every Super-frame, is accessed through CSMA (carrier sensing multiple access) by ALL WRANs on a particular RF channel. Used complementarily with the reserved SCWs, the purposes of the “J” SCW is to allow, for example A newly operating WRAN to communicate with the existing WRANs or with the other newly starting WRANs for spectrum resource reservation or contention (i.e. data frames or SCWs reservations), group joining, or other inter-WRAN communications purposes A WRAN that doesn’t have any SCW reservation to communicate with the other WRANs. Wendong Hu, STMicroelectronics

Coexistence Communications (Cross-channel) January 2009 Coexistence Communications (Cross-channel) Step 1: Discover the SCW reservation pattern on a out-of-band RF channel (ChX) Step 2: Identify the reserved SCWs (i.e. TXOPs) of the source WRANs (the ones to which the receiving WRAN intends to listen) on ChX from the discovered SCW pattern. Step 3: Receive CBP packets during the reserved SCWs of the source WRANs on ChX, or during the J-SCW of ChX in which the source WRAN could also transmit CBP packets. Wendong Hu, STMicroelectronics

January 2009 References Wendong Hu, STMicroelectronics