Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)
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Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: Complex EM Environment in Chinese Hospitals Date Submitted: July 12, 2012 Source: WeiXia Zou, Guiye Wang, Zhenyu Wang, BUPT ; Liang Li, Vinno;

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Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

Submission Title:Complex EM Environment in Chinese Hospitals

Date Submitted: July 12, 2012

Source: WeiXia Zou, Guiye Wang, Zhenyu Wang, BUPT ; Liang Li, Vinno;

Suite 202, Building D, No.2 Xinxi Lu, Beijing, China,

Voice: 1-914-333-9687, FAX: 1-914-332-0615,

E-Mail: [email protected]

Abstract: Opening report for TG4n(MBAN) Task Group

Purpose: Outline accomplishments from the March 2012 meeting and planned tasks for this meeting.

Notice: This document has been prepared to assist the IEEE P802.15. 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 acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15.

Liang Li Vinno


Spectrum allocation china 15 6 nb
Spectrum allocation Area Networks (WPANs)(China & 15.6 NB)

  • Transmit power limits(China):

  • 174-216MHz, 407-425MHz, 608-630MHz: 10mW

  • 402-405MHz: 25μW (limit bandwidth to 300kHz)

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Crowded chinese hospital
Crowded Chinese Hospital Area Networks (WPANs)

  • Due to differences on healthcare system, Chinese intent to hospitals and ask helps from doctors. Chinese hospitals are overcrowded terribly.

  • Such as Beijing hospitals, patients from all of China are crowded in lobby, halls, waiting areas, garden, and anywhere.

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Characteristics of mabn
Characteristics of MABN Area Networks (WPANs)

  • Therefore, MBAN is intensive in Chinese hospital, and inter-network interferences are serious, and there also exists relative motion among BANs

  • Preceiver = Ptransimmiter*10^(Pathloss/10)

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Path loss model in hospital room
Path loss Model in Hospital Room Area Networks (WPANs)

Pathloss= -Pl0-10*n*lg(d/d0)-L_nw;

d0=1m;

Pl0(attenuation of d0)=20*lg(4*pi*f/c);

40.5dB(2.4Ghz)/30.6dB(780Mhz)

28.6dB(610Mhz)/25dB(410Mhz)/19.3dB(210Mhz);

Pathloss coefficient: n=3.0 ;

(open area 2.0-2.5 half-close area 2.5-3.0 close area 3.0-3.5)

L_nw(penetrate loss)=n1*L1+n2*L2

(number of concrete wall:n1;concrete attenuation:L1;

number of human body:n2;human body attenuation:L2)


Conditions
Conditions Area Networks (WPANs)

Transmit power:1mw (0dBm)

Preceiver = Ptransimmiter*10^(Pathloss/10)


Attenuation coefficients
Attenuation Coefficients Area Networks (WPANs)

  • The attenuation of penetrating the concrete(200mm depth):

  • 2.4GHz L1= 13dB

  • 780Mhz L1= 11dB

  • 610MHz L1= 10dB

  • 410MHz L1= 9dB

  • 210MHz L1= 8dB


Attenuation coefficients1
Attenuation Coefficients Area Networks (WPANs)

  • According to Rec. ITU-R P.1406-1

    The attenuation of penetrating the human body:

  • 2.4GHz L2= 20dB

  • 780Mhz L2=16dB

  • 610MHz L2= 14dB

  • 410MHz L2= 13.5dB

  • 210MHz L2= 15.5dB

Liang Li , Vinno


Transmission power as penetrating one layer of the concrete wall 200mm
Transmission Power as penetrating one layer of the concrete wall(200mm)

Transmission Power in Free Space as Penetrating one concrete wall

Transmit power:1mw (0dBm)

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Transmission power as penetrating one human body
Transmission Power as penetrating one human body wall(200mm)

Transmission Power in Free Space as Penetrating one human body

Transmit power:1mw (0dBm)


Transmission Power in free-fade and NLOS wall(200mm)

Left Fig: Transmission Power in Free Space,

Right Fig: Transmission Power in Free Space as Penetrating one wall and one human body.


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