1. January 2011 Minho Cheong, ETRI and Peter Loc, RalinkSlide 1 Supporting Document for Wall Penetration Loss Authors: doc.: IEEE 802.11-10/0078r1 Submission

2. Background In TGac simulation scenario #4 (in-home entertainment with OBSS), there are two types of walls. (room walls, outside walls) It is needed to define its wall penetration loss for realistic network simulation. Slide 2Minho Cheong, ETRI and Peter Loc, RalinkSubmission January 2011 doc.: IEEE 802.11-10/0078r1

3. January 2011 AP and STA Locations in Scenario #4 Room walls are introduced at x=-39 and x=41. doc.: IEEE 802.11-10/0078r1 Slide 3

4. January 2011 When We Set Wall Penetration Loss, It depends quite a lot upon several factors such as –Frequency –Structure of wall (& number of layers in the structure) –Materials of wall (& mixing or not) –Wet or dry –Window or not (& size of window) –And so on It is not possible to set a typical value covering all cases. Instead, we try to pick an acceptable one which can be roughly applied to general case. From several references (measurements @ 5GHz band) doc.: IEEE 802.11-10/0078r1 Slide 4

5. Measurement by USC (2002) [1] Slide 5Minho Cheong, ETRI and Peter Loc, RalinkSubmission January 2011 < 0.01dB (blinds) ~ 15dB (brick) according to various materials doc.: IEEE 802.11-10/0078r1

6. Measurement by Lund Univ. (1999) [2] Slide 6Minho Cheong, ETRI and Peter Loc, RalinkSubmission January 2011 For a mixture wall 1 dB ~ 10 dB loss variation according to frequency (5~6GHz) doc.: IEEE 802.11-10/0078r1

7. Document by UK Government (1997) [3] Radio Comm. Agency in Department of Trade & Industry Slide 7Minho Cheong, ETRI and Peter Loc, RalinkSubmission January 2011 This document concluded that - 10 dB would be a practical figure for outside wall - based upon 9 other references. doc.: IEEE 802.11-10/0078r1

8. Measurement by ERC (1999) [4] ERC : European Radio-communications Committee Slide 8Minho Cheong, ETRI and Peter Loc, RalinkSubmission January 2011 Typical interior materials : 0.4 dB ~ 3.4 dB loss Typical exterior materials : 6.9 dB ~ 11.7 dB loss doc.: IEEE 802.11-10/0078r1

9. Measurement Results 10 dB per an outside wall can be an acceptable figure at 5GHz band for wall penetration loss based on various references. 3 dB per a room wall can be an acceptable figure at 5GHz band for wall penetration loss based on various references. Slide 9Minho Cheong, ETRI and Peter Loc, RalinkSubmission January 2011 doc.: IEEE 802.11-10/0078r1

10. Conclusion So, it can be described in simulation scenario #4 of Functional Requirements and Evaluation Methodology Document –“Attenuation factor of each room wall is set to 3 dB” –“Attenuation factor of each outside wall is set to 10 dB”. Slide 10Minho Cheong, ETRI and Peter Loc, RalinkSubmission January 2011 doc.: IEEE 802.11-10/0078r1

11. References [1] Propagation losses through common building materials: 2.4GHz vs. 5GHz, 2002. [2] Wideband measurement and analysis of penetration loss in the 5GHz band, 1999. [3] Building shielding loss at 5GHz, 1997. [4] Compatibility studies related to the possible extension band for HIPERLAN at 5GHz, 1999. Slide 11Minho Cheong, ETRI and Peter Loc, RalinkSubmission January 2011 doc.: IEEE 802.11-10/0078r1