TVBD Common Functions across IEEE 802 Draft tutorial May 2007 doc.: IEEE 802.11-07/0010r0 Feb. 2009 TVBD Common Functions across IEEE 802 Draft tutorial Date: 2009-02-20 Authors: 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 <http:// 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 <shellhammer@ieee.org> 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 <patcom@ieee.org>. Mariana Goldhamer, Alvarion Steve Shellhammer, Qualcomm

Challenges No more free spectrum May 2007 doc.: IEEE 802.11-07/0010r0 Feb. 2009 Challenges No more free spectrum Therefore, we need to use “available" spectrum allocated for COMMON usage Increased wireless traffic requirements High variety of services inside 802 community High variety of business cases To solve: Use the TVWS new spectrum efficiently Optimally accommodate all the provided services and business cases Mariana Goldhamer, Alvarion Steve Shellhammer, Qualcomm

TVWS Spectrum Sharing Incumbents (TV, wireless microphones, etc.) May 2007 doc.: IEEE 802.11-07/0010r0 Feb. 2009 TVWS Spectrum Sharing Incumbents (TV, wireless microphones, etc.) FCC Rules Data-base approach Sensing High interference environment Low path loss Low building penetration: only 6-10dB Reduced number of free channels in some geographies Mariana Goldhamer, Alvarion Steve Shellhammer, Qualcomm

Desired E2E common functionality May 2007 doc.: IEEE 802.11-07/0010r0 Feb. 2009 Desired E2E common functionality Cognitive detection Synchronized silence intervals Cognitive beacon design Inter-system coexistence Media access procedures Technology-independent information and protocols Inter-system distributed communication Centralized information source Access to the FCC-defined data-base Protocol and security Mariana Goldhamer, Alvarion Steve Shellhammer, Qualcomm

Enablers for cognitive detection - Silence May 2007 doc.: IEEE 802.11-07/0010r0 Feb. 2009 Enablers for cognitive detection - Silence FCC defines very low detection levels -114dBm On 6MHz for ATSC, 100kHz for NTSC, 200kHz for wireless microphone Synchronized silence GPS time synchronization Network –based synchronization: IEEE 1588 or a Network Time Protocol (NTP) Objective Define cross-802 silence intervals Mariana Goldhamer, Alvarion Steve Shellhammer, Qualcomm

Enablers for cognitive detection - Beacons May 2007 doc.: IEEE 802.11-07/0010r0 Feb. 2009 Enablers for cognitive detection - Beacons Cognitive beacons 802.22 is the natural focal point for this activity 802.22.1 is designing the Wireless Mics beacons, now in Sponsor Ballot There is an interaction between the Silent Slots design and Beacon design Synchronization Duration Repetition interval Process Higher interaction in 802 for accommodating all the intended services by all the interested groups Common meetings Shared file access Mariana Goldhamer, Alvarion Steve Shellhammer, Qualcomm

Example: beacons and silence intervals May 2007 doc.: IEEE 802.11-07/0010r0 Feb. 2009 Example: beacons and silence intervals Silence Operation Operation DVBD Mics. Beacon Operation Operation time GPS Sync. Synchronized silence and beacon transmission Mariana Goldhamer, Alvarion Steve Shellhammer, Qualcomm

Coexistence between TVBD May 2007 doc.: IEEE 802.11-07/0010r0 Feb. 2009 Coexistence between TVBD Scope Allow ALL the 802 technologies to optimally serve their markets Optimally use of the spectrum Approach Cooperation and coordination Coordinated MAC approach for interference avoidance Technology-independent protocols Centralized Server for contact information Mariana Goldhamer, Alvarion Steve Shellhammer, Qualcomm

Interference avoidance – lower levels May 2007 doc.: IEEE 802.11-07/0010r0 Feb. 2009 Interference avoidance – lower levels Enhanced Protocols for Media Access LBT not good enough Energy detection levels are at least 10dB higher than sensitivity levels High statistics of hidden nodes in WMAN service Enforcement of synchronized time-frequency slots with reduced interference Coexistence MAC Frame Process Requires a new frame-work in 802 Mariana Goldhamer, Alvarion Steve Shellhammer, Qualcomm

Technology-independent coexistence May 2007 doc.: IEEE 802.11-07/0010r0 Feb. 2009 Technology-independent coexistence Based on distributed inter-system communication within Coexistence Community Coexistence Protocol – first time defined in 802.16h Primitives to higher layers Information Occupied channels and location RF and deployment parameters Control messages Interferer identification Interferer power reduction Frequency channel switching Coexistence Frame related Protocols for pro-active coexistence scheduling – Token Protocol Mariana Goldhamer, Alvarion Steve Shellhammer, Qualcomm

Additional information from a shared Server May 2007 doc.: IEEE 802.11-07/0010r0 Feb. 2009 Additional information from a shared Server Enforce cognition related to 802 TVBDs Location information Technology used Linkage between MAC and Network address RF parameters Channel center and width Mariana Goldhamer, Alvarion Steve Shellhammer, Qualcomm

Security problems Denial attacks May 2007 doc.: IEEE 802.11-07/0010r0 Feb. 2009 Security problems Denial attacks Based on knowledge of the network address False data-base entries which can block an operational channel Assess the active operation at the indicated location Cross this information with the data-base info More details: https://mentor.ieee.org/802-sg-whitespace/file/09/sg-whitespace-09-0026-03-0000-security-ad-hoc-report-draft.ppt Mariana Goldhamer, Alvarion Steve Shellhammer, Qualcomm

E2E solution for coexistence support May 2007 doc.: IEEE 802.11-07/0010r0 Feb. 2009 E2E solution for coexistence support Problem 802 limits itself to lower levels Cooperation with IETF, SC41 is possible but: Long time scales Eventually will happen after ending the specific 802 project Broken link Process Assign 802.21 for dealing with these issues Primitives to be provided by the interested WGs 802.16h has already defined an extensive set Add headers for IP encapsulation 802 should not broke an E2E solution for a trivial technical issue Mariana Goldhamer, Alvarion Steve Shellhammer, Qualcomm

Access to the FCC defined data-base May 2007 doc.: IEEE 802.11-07/0010r0 Feb. 2009 Access to the FCC defined data-base Real-time protocol for requesting the available operational channels at a given location Only for GPS-enhanced radios Protocol at network layer May be defined outside 802 The acquired information will interact with a Radio Resource Manager within the TVBD which is NOT in the scope of 802 projects Process: collaboration with external standards organizations Mariana Goldhamer, Alvarion Steve Shellhammer, Qualcomm

May 2007 doc.: IEEE 802.11-07/0010r0 Feb. 2009 Conclusions There is a clear requirement for cooperation between 802 devices Synchronized operation shall be enforced for supporting sensing, coexistence and beacon design Coexistence at low layers shall use a coordinated approach Support of an E2E solution for coexistence messages supporting protocols and and data-base access shall be provided by 802 Mariana Goldhamer, Alvarion Steve Shellhammer, Qualcomm