1. <January 2008>
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [Consideration of Coexistence Problem]
Date Submitted: [11 January 2008]
Source: [Changsoo Eun, Seungmoon Ryu] Company [CNU, Casuh, Inc.]
Address [220 Yuseong-gu, Gung-dong, Daejeon, Korea]
Address [813 Leaders Building, Yatap-dong, Bundang-gu, Seongnam, Gyeonggi-do , Korea ]
Voice:[ , ], FAX: [ , ],
Re: [Contribution to IEEE Meeting, January 2008]
Abstract: [Address the coexistence problem and its remedy]
Purpose: [Proposal]
Notice: This document has been prepared to assist the IEEE P 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 P
<C. Eun, S. Ryu>, <CNU, Casuh>

2. Consideration of Coexistence Problem
Changsoo Eun, CNU
Seungmoon Ryu, Casuh, Inc.
January 13-18, 2008

3. doc.: IEEE 802.15-<doc#>
<month year>
doc.: IEEE <doc#>
<January 2008>
Near-Far Problem
When two networks coexist, a transmitter next to the receiver deteriorates the receiver signal quality. S5 M S3 S2 C F S1 A S6
Tx : 0dbm
Rx : -80dbm
Spurious :-60dbm
<C. Eun, S. Ryu>, <CNU, Casuh>
<author>, <company>

4. <January 2008>
Near-Far Problem
Even when the frequencies are different, the phase noise comes into trouble.
<C. Eun, S. Ryu>, <CNU, Casuh>

5. Near-Far Problem Or receiver non-linearity causes trouble.
<January 2008>
Near-Far Problem
Or receiver non-linearity causes trouble.
<C. Eun, S. Ryu>, <CNU, Casuh>

6. Near-Far Problem If A1 ≪ A2, when α3 < 0. <January 2008>
<C. Eun, S. Ryu>, <CNU, Casuh>

7. Near-Far Problem Inter-modulation due to nonlinearity
<January 2008>
Near-Far Problem
Inter-modulation due to nonlinearity
<C. Eun, S. Ryu>, <CNU, Casuh>

8. Remedy Synchronized and scheduled data transmission and reception
<January 2008>
Remedy
Synchronized and scheduled data transmission and reception M S1 S2 S3 S5 S6
Super Frame D B A C R T
T/R
R/T
<C. Eun, S. Ryu>, <CNU, Casuh>

9. Remedy An example of data formats <January 2008>
<C. Eun, S. Ryu>, <CNU, Casuh>

10. Remedy One master among the multiple pico-nets in the same area
<January 2008>
Remedy
One master among the multiple pico-nets in the same area
One hopping pattern for each pico-net
TDMA for devices within each pico-net
<C. Eun, S. Ryu>, <CNU, Casuh>