Spectrum Estimation Algorithm

1
Spectrum Estimation Algorithm

• Sep. 9, 2005
• China

2
Outline

• Introduction
• Input parameters
• Procedures
• Problems
• Some considerations

3
Introduction

• A Software for calculation of Spectrum
  Requirements has been developed
• Algorithm Mainly Based on Attachment 4.7 Towards
  methodology for calculation of spectrum
  requirements for the future development of
  IMT-2000 and systems beyond IMT-2000 from the
  year 2010 onwards of CHAPTER 4 Meeting Report of
  future Services and Market Aspects Working Group
  of Report on the 16th meeting of Working Party
  8F.
• The software will be updated according to the
  process of ITU-8F

4
Outline

• Introduction
• Input parameters
• Procedures
• Problems
• Some considerations

5
Input parameters (Page1 of 4)

• Market attribute values of each service, such as,
  User density, Session arrival rate per user ,
  Mean service bit rate , Average session duration
  , mobility ratio (Corresponding to Table 5-13 in
  Attachment 4.7 Questionaire on Market and
  Services)
• Service category parameters , such as Mean Packet
  size b/packet, Second moment of packet size
  (b/packet)2, Allowed mean packet delay
  s/packet, Allowed blocking rate served in
  circuit switched or packet switched mode of each
  SC (Table 5-4 )
• Possible combinations of service category,
  service environment and radio environment for one
  RAT group (table 5-16)

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Input parameters (Page2 of 4)

• distribution ratios among available RAT groups
  (table 5-17)
• Population coverage percentage of the radio
  deployment environments in each service
  environment (table 5-9)
• The identification of Service Environments (table
  5-5)

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Input parameters (Page3 of 4)

• Typical cell area of the radio deployment
  environments (table 5-7 column 4,table 5-8)
• Radio parameters for RATGs, such as Guard band
  between operators, area spectral efficiency, min
  Spec granularity, channel rate (table 5-10)
• Area spectral efficiency matrix for each RAT
  group (table 5-11)
• Others number of operators

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Input parameters (Page4 of 4)
Summary 10 kinds of input parameters
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Outline

• Introduction
• Input parameters
• Procedures
• Problems
• Some considerations

10
Procedures

• Calculate market attribute values per each SC
  SE time interval (by table 5-13 Market
  attribute values of each service), so table 5-15
  obtained, then calculate session request rate Pn
  and average traffic volume a session attempt Tn
  per each SC SE time interval (OutputPn Tn MRn
  µn /SESC)
• Determine distribution ratios of traffic among
  radio access technologies RE
• Determine distribute ratios among the radio
  environments mainly based on mobility (by table
  5-9 and outcome of Procedure 1 MRn)
• Calculate distribute ratios of traffic of all
  supported SCSEs among RATRE (muitily output of
  2? by table 5-16 which combination of RAT group
  and radio environment can/cannot support a given
  SC in a given SE, and table 5-17 Distribution
  between RAT groups ) (output ?m,n,rat,p)

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Procedure

• Distribute session arrival rates within RATG RE
  (by outcome of Procedure12) (output Pm,n,rat,p)
• Session arrival rate per cell (by table 5-8 and
  outcome of Procedure3) (output Pm,n,rat,p)
• Calculation of offered traffic , accumulated over
  the service environments which belong to the same
  Teledensity, CS/PS respectively (CS table 5-5,
  Procedure1 µn and outcome of Procedure4 PS
  table 5-5, Procedure1 Tn and outcome of
  Procedure4)
• Determination of the required system capacity
  CS PS respectively(by outcome of
  Procedure5)(outputCrat,p,tel,cs/ps)
• Determine spectrum requirements (by outcome of
  Procedure6 and table 5-11 5-10)
• Applying necessary adjustments (by outcome of
  Procedure7)(output F)

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Outline

• Introduction
• Input parameters
• Procedures
• Problems
• Some considerations

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Problems

• area spectral efficiency (table 5-11),
• Weight of MR

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Outline

• Introduction
• Input parameters
• Procedures
• Problems
• Some considerations

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Some considerations about input parameters

• According to the document Answers to Q(1125) ",
  the input parameter categories to be considered
  in our test case are as follows
• Teledensity dense urban only, i.e. SEs include
  SE1(home), SE2(office) and SE3(public)
• RATG RATG1 and RATG2 only ( multicast supported
  by RATG is not considered)
• RE macro cell, micro cell and pico cell only
• FSU calculate the needed spectrum in busy hours
  of 19, 20 and 21PM separately, to prepare for
  potential FSU adoption

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Issues

• About some parameters
• (Should they be provided byTechnology SWG ?)
• SC
• CSBlocking probability , Service channel data
  rate kbit/s, Channel Data Rate Granularity
  kbit/s
• PSMean Packet Size kbit/packet, Second Moment
  of Packet Size kbit2/packet2, Mean delay
  requirement s/packet
• RATG such as area spectral efficiency

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Issues

• Meaning of Vn (the number of channels for
  category n ) in the Multidimensional Erlang-B
  formula for CS traffic
• the ratio of the service bit rate for category n
  to a unit data rate for all service categories ?
• and for all systems (pre3G, 3G and B3G) ?

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