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 PUBLIC  NOTICE  FEDERAL  COMMUNICATIONS  COMMISSION  445  12th  St.  SW  WASHINGTON,  D.  C.  20554 
 News  media  information  202/  418-  0500  Fax-  On-  Demand  202/  418-  2830  Internet:  http://  www.  fcc.  gov 
 DA  01-  2754 
 Released:  November  27,  2001 


 Time  Division  Duplex  (TDD)  Technology:  Applications,  Benefits,  and  Opportunities 
 The  Office  of  Engineering  and  Technology  will  host  a  tutorial  by  the  TDD  Coalition  on 
 Time  Division  Duplex  (TDD)  Technology  Monday,  December  3  from  9:  30  a.  m.  to  12:  00 
 p.  m.  in  the  Commission  Meeting  Room  (TWC-  305),  445  12th  Street,  S.  W.,  Washington, 
 D.  C. 


 Technological  advances  in  the  field  of  digital  communications  and  the  widespread  use  of 
 Internet  networking  protocols  in  recent  years  have  led  to  the  emergence  of  new  digital 
 multimedia  applications  and  devices.  While  user  applications  have  traditionally  been 
 circuit  switched  and  focused  on  voice,  these  new  applications  are  predominately  packet-switched 
 and  centered  on  data.  A  significant  characteristic  of  these  applications  is  the 
 asymmetry  of  traffic  flow  both  to  and  from  the  user.  Therefore,  efficient  use  of  systems 
 resources  may  suggest  utilizing  a  duplexed  approach  that  supports  the  asymmetric  nature 
 of  this  form  of  traffic,  such  as  TDD. 


 At  the  tutorial,  representatives  of  the  TDD  Coalition  will  provide  a  comparative  overview 
 of  duplexing  schemes  including  both  frequency  division  and  time  division  duplexing.  The 
 performance-  related  parameters  of  each  scheme,  such  as  spectral  efficiency  and 
 compatibility  with  advanced  signal  processing  techniques  will  be  discussed.  The  current 
 worldwide  markets  and  applications  for  TDD  technology  in  both  mobile  and  fixed  wireless 
 areas  will  then  be  discussed.  A  discussion  of  relevant  globally  accepted  standards 
 supporting  TDD  operations  will  follow.  Next,  the  TDD  Coalition  will  present  an  analysis 
 of  interference  mitigation  techniques.  Finally,  emerging  opportunities  for  both  fixed  and 
 mobile  TDD  applications  in  the  United  States  will  be  discussed. 


 Members  of  the  public  are  encouraged  to  attend  this  tutorial.  Admittance,  however,  will 
 be  limited  to  the  seating  available  in  the  Commission  meeting  room.  Please  allow  sufficient 
 time  for  clearance  through  Commission  security  before  the  seminar  begins.  The  audio 
 portion  of  this  conference  will  be  broadcast  live  on  the  Internet  via  the  FCC's  Internet 
 audio  broadcast  page  at  http://  www.  fcc.  gov/  realaudio.  Additional  information  concerning 
 this  tutorial  may  be  obtained  from  Kent  Nilsson  at  the  FCC  at  202-  418-  0845  (e-mail: 
 knilsson@  fcc.  gov),  TTY  202-  418-  2989. 
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