Spectrum and Sharing Studies for IMTAdvanced

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Spectrum and Sharing Studies for IMT-Advanced

• Jiao Jian
• CCSA, China
• March, 2007

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Outline

• The current status of Sharing studies in ITU-R
  WP8F
• The future of Candidate Bands for IMT-Advanced

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Current Sharing Studies List in ITU-R WP8F

• Sharing studies between IMT-Advanced and the
  Fixed Satellite Service in the 3 400-4 200 and 4
  500-4 800 MHz band
• Sharing studies between IMT-Advanced and
  Radiolocation Services in the 2 700-2 900 and 3
  400-3 700 MHz band
• Sharing studies between IMT-2000 and Terrestrial
  Digital Broadcasting in the 470-806/862 MHz band
• Sharing studies between radiocommunication
  services and IMT systems operating in the 450-470
  MHz band
• Sharing studies between IMT-2000 and Fix/Nomadic
  BWA systems in the 2 500-2 690 MHz band
• Sharing studies between IMT-2000 and other MBWA
  systems operating in the 2 500-2 690 MHz band

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1. The current status of Sharing Studies between
IMT-Advanced and the Fixed Satellite Service in
the 3 400-4 200 and 4 500-4 800 MHz band(1/2)

• Branch Points
• When assessing the interference from IMT to
  FSS,whether the analyses are based on the
  propagation models for the long-term interference
  criteria or the short-term interference criteria?
• Are the locations and parameters of the earth
  stations which are provided in the contributions
  from Intelsat actual and reliable?
• whether "In cases where these coordination
  contours extend across borders into other
  countries, these other countries need to
  coordinate with the earth station in question
  before implementing IMT-Advanced services in the
  part of their own country which is inside the
  coordination contour" should be considered in the
  sharing studies or not?
• what is the validity and relevant condition of
  Sector Disable, Multi-Carriers, MIMO SDMA,
  Downtilting, other mitigation techniques?
• whether the tow different views from Satellite
  side and IMT side are both shown in the sharing
  studies or not?

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1. The current status of Sharing Studies between
IMT-Advanced and the Fixed Satellite Service in
the 3 400-4 200 and 4 500-4 800 MHz band(2/2)

• Current Results
• Because the propagation models cant be arrived
  at an agreement, the tow different views from
  Satellite side and IMT side are both shown in the
  sharing studies provisionally
• Finalize PDN Report (IMT.SHARING.CANDI) on FSS/FS
  sharing studies at the 22nd meeting of Working
  Party 8F

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2. The current status of Sharing Studies between
IMT-Advanced and Radiolocation Services in the
2700-2900 and 3 400-3 700 MHz band(1/2)

• Branch Points
• When assessing the interference between IMT and
  Radar,whether the analyses are based on the
  propagation models for the long-term interference
  criteria or the short-term interference criteria
  and 0.001 of time probability?
• Whether the propagation models for the short-term
  interference criteria need to be used for
  specific scenarios and assumptions or not?
• Whether the propagation models for the short-term
  interference criteria can be applied to Point to
  Area, in NLOS and multipath environment or not?
• Whether "the compatibility of airport
  surveillance radars and meteorological radar with
  IMT systems within the 2700-2900 MHz band" is
  report or recommendation?

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2. The current status of Sharing Studies between
IMT-Advanced and Radiolocation Services in the
2700-2900 and 3 400-3 700 MHz band(2/2)

• Current Results
• The propagation models cant be arrived at an
  agreement
• It cant be arrived at an agreement whether "the
  compatibility of airport surveillance radars and
  meteorological radar with IMT systems within the
  2700-2900 MHz band" is report or recommendation
• To facilitate the work prior to the 22nd meeting
  of WP 8F it was decided to establish the
  correspondence group forum on Radar sharing
  studies with terms of reference
• Finalize PDN Recommendation/Report
  (IMT.SHARING.CANDI) on Radar sharing studies at
  the 22nd meeting of Working Party 8F

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3. The current status of Sharing Studies between
IMT-2000 and Terrestrial Digital Broadcasting in
the 470-806/862 MHz band

• Branch Points
• When assessing the interference from IMT to
  DVB,whether the analyses are based on the
  propagation models for the long-term interference
  criteria or the short-term interference criteria?
• How to rearrange the frequency for DVB?
• Whether WORKING PARTY 6E and 8F can jointly
  participate in the development of a methodology
  for sharing studies between IMT and broadcasting
  services in bands 470-806/862 MHz or not?
• Current Results
• The propagation models cant be arrived at an
  agreement
• Finalize PDN Report (IMT.SHARING.CANDI) on DVB
  sharing studies at the 22nd meeting of Working
  Party 8F

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4. The current status of Sharing Studies between
radiocommunication services and IMT systems
operating in the 450-470 MHz band(1/2)

• Branch Points
• In the case of interference from CDMA450 Base
  Stations to Fixed Service Base Station and Mobile
  Service Base Station,whether An Mitigation
  technique would be to use a notch filter at the
  transmitting station or not?

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4. The current status of Sharing Studies between
radiocommunication services and IMT systems
operating in the 450-470 MHz band(2/2)

• Current Results
• If mitigation techniques can be provided, the
  broadcasting base stations operating in the
  470-480 MHz band and IMT mobile and base stations
  operating in the 450-470 MHz band can
  successfully operate in adjacent spectrum
• If mitigation techniques can be provided, the
  systems in the radiolocation service operating in
  the 440-450 MHz band and IMT mobile and base
  stations operating in the 450-470 MHz band can
  successfully operate in adjacent spectrum
• The coexistence between IMT base stations
  operating in the 450-470 MHz band and the various
  fixed and mobile service base stations operating
  in the 450-470 MHz band may be a challenge even
  with the use of the mitigation techniques

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5. The current status of Sharing Studies between
IMT-2000 and Fix/Nomadic BWA systems in the 2
500-2 690 MHz band

• Branch Points
• Propagation Models
• Performance evaluation criteria
• Rationality of simulation results
• Input parameters and assumptions
• Current Results
• Send liaison statement to Working Party 3K on use
  of propagation models in WP 8F sharing studies
  between IMT-2000 and other Broadband Wireless
  Access systems in the 2 500-2 690 MHz band
• To facilitate the work prior to the 22nd meeting
  of WP 8F it was decided to continue with the
  existing correspondence group forums on BWA
  sharing studies with revised terms of reference
• Finalize PDN Report (IMT.SHARING.FBWA 2.5 GHz) at
  the 22nd meeting of Working Party 8F

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6. The current status of Sharing Studies between
IMT-2000 and other MBWA systems operating in the
2 500-2 690 MHz band

• Branch Points
• Propagation Models
• Input parameters and assumptions
• Current Results
• To facilitate the work prior to the 22nd meeting
  of WP 8F it was decided to continue with the
  existing correspondence group forums on MBWA
  sharing studies with revised terms of reference
• Progress the working document towards a PDN
  Report (IMT.SHARING.MBWA 2.5 GHz) at the 22nd
  meeting of Working Party 8F

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Spectrum Enough?(1/2)

• Spectrum for IMT-2000
• 1990 - developed spectrum requirement for 3G
• 1992 - WARC 1992 identified 230 MHz for IMT-2000
  in Radio Regs through a footnote-IMT exclusivity
  view
• 2000 - WRC 2000 identified 165 MHz additional
  spectrumfor IMT globally in mobility bands IMT
  exclusivity view shared view (eg., 2.5 GHz
  band)
• 2003 - WRC 2003 identified future agenda items
  for WRC-07 on possible further spectrum additions
  for IMT
• GuardedIMT-2000 spectrum and footnote while
  people were still busy trying to get 2G working
  and successful continue task through 3G
  deploymentsand into the future

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Spectrum Enough?(2/2)
Table 1 Predicted spectrum requirements by the
year 2020 for IMT
Note 1 Prediction based on one network
deployment from ITU-R M.IMT.ESTIMATE
Table 2 Candidate bands for the future
development of IMT-2000 and systems beyond
IMT-2000
Note 2 listed candidate bands for IMT-2000 and
IMT-Advanced from ITU-R M.IMT.CANDI Note 3 the
prioritized candidate bands for mobile access
focus on bands between 400 MHz and 5 GHz
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Spectrum Now?

• Planning for Future Spectrum needs for IMT-2000
  and Systems Beyond IMT-2000 must occur today
  opportunity in WRC context occurs in
  approximately 4 year intervals
• Difficult to get Agenda Item on a particular
  spectrum initiative
• WRC-07 agenda set in WRC-03 in anticipation of
  the rapid advance in the market needs
• Window of opportunity if cannot prevail in
  WRC-07 with substantive showing and clearly
  stated conclusions, then probability is that the
  next opportunity might not be until WRC-15, but
  certainly no sooner than WRC-11
• Must also consider the additional time for
  spectrum to be made available individual
  Administration processes after WRC decisionsand
  build out timeframes for systems
• If not now for future when ? .. Will suitable
  spectrum be available as time progresses?..

Can our customers and our industry afford to
wait??
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Thanks!

• jiao_jian_at_huawei.com