Submission doc.: IEEE 802.11-15/0296r0 March 2015 Cagatay Capar, EricssonSlide 1 Long range indoor channel measurements for the 60 GHz band Date: 2015-03-08.

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Submission doc.: IEEE /0296r0 March 2015 Cagatay Capar, EricssonSlide 1 Long range indoor channel measurements for the 60 GHz band Date: Authors:

Submission doc.: IEEE /0296r0 Abstract New channel models are needed to support the wide range of use cases envisioned for NG60. Channel measurements are important to help with channel modeling efforts. This contribution presents some results from a channel measurement campaign carried out within the METIS project [1]. Long range indoor office signal strength measurements in the 60 GHz band for both line-of- sight and non-line-of-sight are given. Measurements of loss due to blockages are shown. Slide 2Cagatay Capar, Ericsson March 2015

Submission doc.: IEEE /0296r0 Outline Motivation/Related Work Office corridor long range measurements Blockage due to door, window, wall Human blockage measurements Summary and Conclusions Slide 3Cagatay Capar, Ericsson March 2015

Submission doc.: IEEE /0296r0 Motivation/Related work Many new use cases are envisioned for NG60, covering short, medium, and long range communications [2]. New channel models that complement ad channel models [3] are needed to support these use cases. Channel measurements are important to help with channel modeling efforts. Outdoor channel measurements were presented and a channel modeling approach was proposed in [4]. Slide 4Cagatay Capar, Ericsson March 2015

Submission doc.: IEEE /0296r0 Office corridor long range measurements Slide 5Cagatay Capar, Ericsson March 2015 Frequency range57.68 – GHz Tx height1 m Rx height1 m Tx/Rx antenna gain10 dBi Tx/Rx antenna beamwidth 60°in elevation plane 30°in azimuth plane Tx/Rx velocityStationary Measurement setup Measurements carried out in an indoor office environment in Stockholm, Sweden by Ericsson.

Submission doc.: IEEE /0296r0 Measurement layout Slide 6Cagatay Capar, Ericsson March Tx locations, 1 Rx location.

Submission doc.: IEEE /0296r0 Measurement results Slide 7Cagatay Capar, Ericsson March 2015 Sharp drop after corner. Clear frequency dependency in NLOS path loss: 15 dB larger at 60 GHz compared to 2.4 GHz. Path loss modeled according to recursive Berg model [5]: Semi-empirical model Proposed for modeling signal strength in urban environment Street corner modeled as a source Diffraction loss at corners calculated as a function of the angle and empirical parameters. Measurements show good agreement with the model. model

Submission doc.: IEEE /0296r0 Recursive Berg model Slide 8Cagatay Capar, Ericsson March 2015 Path loss modeled according to recursive Berg model [5]: Semi-empirical model Proposed for modeling signal strength in urban environment Street corner modeled as a source Diffraction loss at corners calculated as a function of the angle and empirical parameters.  Tx Rx node 0 node 1 node 2 s0s0 s1s1 Model details:

Submission doc.: IEEE /0296r0 Loss due to obstacles Slide 9Cagatay Capar, Ericsson March 2015 Loss due to window = 1.0 dB door = 11.5 dB wall = 7.5 dB

Submission doc.: IEEE /0296r0 Medium range indoor office Tx location 1 (corridor-to-room): 29 dB loss observed in excess of free space loss Tx location 2 (room-to-room): 48 dB loss observed in excess of free space loss Slide 10Cagatay Capar, Ericsson March 2015

Submission doc.: IEEE /0296r0 Human body shadowing Slide 11Cagatay Capar, Ericsson March 2015 Line-of-sight link of 3.7 m. One person walking back and forth in between. Model: Diffraction around four edges of a rectangular screen with 30 cm width.

Submission doc.: IEEE /0296r0 Summary and Conclusions Slide 12Cagatay Capar, Ericsson March 2015 Long range indoor office signal strength measurements are provided for the 60 GHz band. Loss due to blockages such as wall, door, window, human body are measured and shown to be significantly frequency dependent. Sharp drop observed in signal strength once nodes are in none-line-of-sight (NLOS). NLOS measurements show good agreement with the recursive Berg model [5]. This shows that diffraction can be dominant in NLOS 60 GHz links.

Submission doc.: IEEE /0296r0March 2015 Cagatay Capar, EricssonSlide 13 References 1.“METIS Channel Models,” METIS Deliverable D1.4, February /1386r1, “NG60 Usage Models Update” /0334r8, “Channel Models for 60 GHz WLAN Systems” /1486r0, “Channel Models in NG60” 5.J. E. Berg, “A recursive method for street microcell path loss calculations,” Personal, Indoor and Mobile Radio Communications, September, 1995.