May 2008 doc IEEE 802 22 08xxxxr 0

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May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 CBP Success Probability IEEE P

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 CBP Success Probability IEEE P 802. 22 Wireless RANs Date: 2008 -05 -11 Authors: 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. > Submission Slide 1 Cheng Shan, Samsung Electronics

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Abstract • This contribution calculates

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Abstract • This contribution calculates the CBP packets’ coverage, as well as the probability that a CBP packet could successfully reach a neighboring cell • This contribution responses to the resolution of comment #406 Submission Slide 2 Cheng Shan, Samsung Electronics

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Basic Parameters • • CBP

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Basic Parameters • • CBP – Data Rate: 418 bit/10 ms=0. 0418 Mbps (8. 4, [1]) – Detection SNR Threshold: ~1 d. B for QPSK ½ rated 3 -repitition CPE – One directional WRAN antenna • G/T= -19. 52 d. B as in [2] • Directional pattern as in section 8. 12 of [1] – One Omni-directional sensing antenna • Type I: G/T= -19. 52 d. B, as in [2] • Type II: G/T= -35. 63 d. B, as in [3] BS – One Omni-directional WRAN antenna • G/T= -16. 95 d. B, as in [2] Propagation Model – F(50, 90) Submission Slide 3 Cheng Shan, Samsung Electronics

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 CBP Sensitivities for Different Antenna

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 CBP Sensitivities for Different Antenna Types • CPE – CPE WRAN Antenna at direction with max gain: 25. 2 d. B (μV/m) – Sensing Antenna Type I: 24. 9 d. B (μV/m) – Sensing Antenna Type II: 41 d. B (μV/m) • BS – BS WRAN Antenna: 21. 6 d. B (μV/m) Submission Slide 4 Cheng Shan, Samsung Electronics

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Max. Propagation Distance: CPE-to-CPE w/

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Max. Propagation Distance: CPE-to-CPE w/ WRAN Antenna for CBP Reception Submission Slide 5 Cheng Shan, Samsung Electronics

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Max. Propagation Distance: CPE-to-CPE w/

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Max. Propagation Distance: CPE-to-CPE w/ Sensing Antenna Type I for CBP Reception Submission Slide 6 Cheng Shan, Samsung Electronics

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Max. Propagation Distance: CPE-to-CPE w/

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Max. Propagation Distance: CPE-to-CPE w/ Sensing Antenna Type II for CBP Reception Submission Slide 7 Cheng Shan, Samsung Electronics

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Max. Propagation Distance: BS-to-CPE w/

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Max. Propagation Distance: BS-to-CPE w/ WRAN Antenna for CBP Reception Submission Slide 8 Cheng Shan, Samsung Electronics

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Max. Propagation Distance: BS-to-CPE w/

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Max. Propagation Distance: BS-to-CPE w/ Sensing Antenna Type I for CBP Reception Submission Slide 9 Cheng Shan, Samsung Electronics

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Max. Propagation Distance: BS-to-CPE w/

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Max. Propagation Distance: BS-to-CPE w/ Sensing Antenna Type II for CBP Reception Submission Slide 10 Cheng Shan, Samsung Electronics

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Max. Propagation Distance: BS-to-BS Submission

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Max. Propagation Distance: BS-to-BS Submission Slide 11 Cheng Shan, Samsung Electronics

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Short Summary • CPE-to-CPE CBP

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Short Summary • CPE-to-CPE CBP Transmission – CBP packets could not reach far with WRAN antenna or sensing antenna Type II for reception; – Reception with sensing antenna Type I improves the performance; • BS-to-CPE – With WRAN antenna or sensing antenna Type II for reception, the BS transmitted CBP cannot reach out its own cell; – With sensing antenna Type II for reception, the BS transmitted CBP can reach into its neighboring cell; • BS-to-BS – BS can always receive CBP packets transmitted by its neighbor BS, given enough buffer time propagation; Submission Slide 12 Cheng Shan, Samsung Electronics

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Simulation • The following simulations

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Simulation • The following simulations illustrate how likely two neighboring cells could exchange CBP (or, there is at least one CBP path existing, either CPE-to-CPE, BS-to. CPE, or BS-to-BS) in a practical scenario; Submission Slide 13 Cheng Shan, Samsung Electronics

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Simulation Setups • Random active

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Simulation Setups • Random active CPEs are dropped into the area of two neighboring cells according to a certain density • Each CPE points its WRAN antenna to its associated BS • BS association – Rule 1: a CPE in overlap area randomly chooses a BS for association • There are chances for face-to-face CPE-to-CPE CBP transmission – Rule 2: a CPE chooses the nearer BS for association • Always back-to-back CPE-to-CPE CBP transmission Submission Slide 14 Cheng Shan, Samsung Electronics

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 A Snapshot Submission Slide 15

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 A Snapshot Submission Slide 15 Cheng Shan, Samsung Electronics

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 4 W BS Submission Slide

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 4 W BS Submission Slide 16 Cheng Shan, Samsung Electronics

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 100 W BS Submission Slide

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 100 W BS Submission Slide 17 Cheng Shan, Samsung Electronics

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Conclusion • CPE-to-CPE CBP transmission

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Conclusion • CPE-to-CPE CBP transmission is not reliable, large density of operating CPEs is needed to assure good chances of CBP exchange via CPEs • An sensing antenna with better sensitivity (Type I) may help a lot in CBP detection • BS-to-BS CBP transmission is reliable – Propagation delay must be investigated Submission Slide 18 Cheng Shan, Samsung Electronics

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Improvement Options for CBP Detection

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 Improvement Options for CBP Detection • Rely more on BS-to-BS transmission; – The SCW buffer time needs to be carefully designed; • Using sensing antenna type I and rely more on BS-to. CPE transmission; – Buffer time also needs to be considered; • Set up CBP-bridge CPEs at the cell edge which could associate to multiple BSs simultaneously; – TG 2 issue? Submission Slide 19 Cheng Shan, Samsung Electronics

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 References • [1] IEEE 802.

May. 2008 doc. : IEEE 802. 22 -08/xxxxr 0 References • [1] IEEE 802. 22 DRAFT v 1. 0 • [2] 22 -04 -0002 -16 -0000_WRAN_Reference_Model • [3] 22 -06 -0051 -09 -0000_Sensing_Thresholds Submission Slide 20 Cheng Shan, Samsung Electronics