january 2011 minho cheong, etri and peter loc, ralinkslide 1 supporting document for wall...
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January 2011
Minho Cheong, ETRI and Peter Loc, RalinkSlide 1
Supporting Document for Wall Penetration Loss
Authors: Name Affiliations Address Phone email Minho Cheong ETRI 138 Gajeongno, Yuseong-gu,
Daejeon, 305-700, Korea +82-42-860-5635
Peter Loc Ralink Technology
20833 Stevens Creek Blvd, Suite 200., Cupertino CA 95014
408 807-0868 [email protected]
doc.: IEEE 802.11-10/0078r1
Submission
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 2 Minho Cheong, ETRI and Peter Loc, RalinkSubmission
January 2011 doc.: IEEE 802.11-10/0078r1
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
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
Measurement by USC (2002) [1]
Slide 5 Minho Cheong, ETRI and Peter Loc, RalinkSubmission
January 2011
< 0.01dB (blinds) ~ 15dB (brick)
according to various materials
doc.: IEEE 802.11-10/0078r1
Measurement by Lund Univ. (1999) [2]
Slide 6 Minho 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
Document by UK Government (1997) [3]Radio Comm. Agency in Department of Trade & Industry
Slide 7 Minho 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
Measurement by ERC (1999) [4]ERC : European Radio-communications Committee
Slide 8 Minho 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
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 9 Minho Cheong, ETRI and Peter Loc, RalinkSubmission
January 2011 doc.: IEEE 802.11-10/0078r1
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 10 Minho Cheong, ETRI and Peter Loc, RalinkSubmission
January 2011 doc.: IEEE 802.11-10/0078r1
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 11 Minho Cheong, ETRI and Peter Loc, RalinkSubmission
January 2011 doc.: IEEE 802.11-10/0078r1