Submission doc.: IEEE 802.11-15/0179r1 Indoor Wall Propagation Loss Measurements January, 2015 Chuck Lukaszewski, Aruba NetworksSlide 1 Date: 2015-01-14.

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Submission doc.: IEEE /0179r1 Indoor Wall Propagation Loss Measurements January, 2015 Chuck Lukaszewski, Aruba NetworksSlide 1 Date: Authors:

Submission doc.: IEEE /0179r1 Abstract It has been observed that the current Simulation Scenarios significantly understate propagation loss across walls. [1] SS#1 assumes 5dB per wall SS#2 assumes 7dB per wall SS#4a references SS#1 (Outside in penetration) This contribution presents field RF measurements from site surveys using professional grade software tools Recommend uniform loss value of 9 dB / wall in SS #1 and #2 January, 2015 Chuck Lukaszewski, Aruba NetworksSlide 2

Submission doc.: IEEE /0179r1 Framed vs. Concrete/Block Construction Stud and Wallboard Construction (~10dB/wall) Concrete Wall Construction (25-30dB/wall)

Submission doc.: IEEE /0179r1 70,000 Seat Stadium Skyboxes January, 2015 Chuck Lukaszewski, Aruba NetworksSlide 4 Aluminum stud + wallboard (3.3m /11ft wide)

Submission doc.: IEEE /0179r1 70,000 Seat Stadium Skyboxes (5GHz) Aluminum stud + wallboard (3.3m /11ft wide) January, 2015 Chuck Lukaszewski, Aruba NetworksSlide 5 -57dBm-66dBm -60dBm -70dBm -58dBm -67dBm -62dBm -69dBm

Submission doc.: IEEE /0179r1 Jan 2015 Hyatt Regency Ballroom (5 GHz) January, 2015 Chuck Lukaszewski, Aruba NetworksSlide 6 AP in front of room 47:e0:cc Ch dBm -70dBm -67dBm -77dBm Retracting partition wall

Submission doc.: IEEE /0179r1 Jan 2015 Hyatt Regency Ballroom (5 GHz) January, 2015 Chuck Lukaszewski, Aruba NetworksSlide 7

Submission doc.: IEEE /0179r1 Jan 2015 Hyatt Regency Ballroom (5 GHz) January, 2015 Chuck Lukaszewski, Aruba NetworksSlide 8 AP in next room 4f:df:ac Ch dBm -50dBm -69dBm -56dBm Retracting partition wall

Submission doc.: IEEE /0179r1 Jan 2015 Hyatt Regency Ballroom (2.4 GHz) January, 2015 Chuck Lukaszewski, Aruba NetworksSlide 9 AP in front of room ce:41:58 Ch 1 -35dBm -51dBm -42dBm -52dBm Retracting partition wall

Submission doc.: IEEE /0179r1 Private NY Area University Dorm January, 2015 Chuck Lukaszewski, Aruba NetworksSlide 10 Concrete block walls – each dorm room is 3.1m /10ft wide

Submission doc.: IEEE /0179r1 Recommendation Based on data presented, 9 dB is a more conservative value for soundproofed interior walls separating tenants. This assumes wood-frame or aluminum-frame construction with wallboard and standard insulating materials. “Mass walls” made from concrete block, plaster-over-brick, and poured concrete walls have much higher values (at least 25dB) There is no structural reason to use a different value for residential & enterprise scenario. Insulated bearing walls will have similar loss. If anything, residential case will have slightly higher average loss than enterprise. Exterior walls in SS#4a should be modeled using a higher value than 9 dB January, 2015 Chuck Lukaszewski, Aruba NetworksSlide 11

Submission doc.: IEEE /0179r1 Counterpoint 5dB is an appropriate value for interior, non-insulated walls that subdivide an office, house or apartment (when framed walls are used) However, no SS currently uses interior subdividing walls Want to keep pressure on the simulators. Increasing wall loss will effectively reduce the number of interfering OBSS nodes. We could knowingly accept a lower path loss value in order to increase OBSS interference effect, thereby making SS result more conservative. January, 2015 Chuck Lukaszewski, Aruba NetworksSlide 12

Submission doc.: IEEE /0179r1 Straw Poll Do you agree that the penetration loss values in both SS#1 and SS#2 should be increased to 9 dB? Yes/No/Abstain January, 2015 Chuck Lukaszewski, Aruba NetworksSlide 13

Submission doc.: IEEE /0179r1 References 1.14/1590r0 - Zhao, et al, “Multi-wall penetration loss model for HEW system level simulation” – Jan 2014 January, 2015 Chuck Lukaszewski, Aruba NetworksSlide 14