rrc-06 migs, excess and equitable access ebu technical department terry oleary
TRANSCRIPT
RRC-06
MIGS, EXCESS and EQUITABLE ACCESS
EBU
TECHNICAL DEPARTMENT
TERRY O’LEARYTERRY O’LEARYTERRY O’LEARYTERRY O’LEARY
RRC-06
TOPICS
1. MIG
2. SYNTHESIS
3. EXCESS & EQUITABLE ACCESS
RRC-06
TOPICS
• DEFINITION OF A MIG
• BIG MIG
• EXCESS XS• SUBTLETIES (1, 2, 3, ..., )
• RELATIVE SPECTRUM DEMAND RSD• WHAT ‘THEY’ LOOK LIKE• COMPLICATIONS
• CONCLUSIONS
1. MIG
RRC-06
MIGMUTUALLY INCOMPATIBLE GROUP
2 requirements, compatible less than 2 channels needed
2 requirements, IN-compatible 2 channels needed
‘1’ ‘1’
‘1’ ‘2’
‘1’ ‘2’
‘3’
2-MIG
3 requirements, IN-compatible 3 channels needed
3-MIG
‘1’ ‘2’
‘1’
3 requirements less than 3 channels needed
NOT a MIG
4 requirements, IN-compatible 4 channels needed 4-MIG
‘2’ ‘3’
‘4’‘1’
4 requirementsless than 4 channels needed
NOT a MIG
‘2’ ‘3’
‘2’‘1’
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THIS IS A BIGGER MIG WITH 13 REQS
Q: HOW MANY CHANNELS REQUIRED?
BIG
MIG
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XSEXCESS
DRAFT PLAN: BAND IV/V
MIG SIZE = M = 358
# CHANNELS = C = 49
EXCESS = XS = M – C = 358 – 49 = 309
CASE BMIG = 4
ONLY 2 CHANNELS:1, 2
2 REQS CAN HAVE A CHANNEL2 REQS CANNOT HAVE A CHANNEL
THERE IS AN EXCESS OF 2 REQS
EXCESS = XS = 4 – 2 = 2
CASE AMIG = 4
5 CHANNELS:1, 2, 3, 4, 5
EACH REQ CAN HAVE A CHANNELWITH NO INCOMPATIBILITY
THERE IS NO EXCESS IN REQS
RECALL: ‘BIG’ MIG SIZE 13
RRC-06
NO 3-MIG
2-MIGs
2 CHANNELS ?
1
2
12
?? = 3
MORAL :SOMETIMES
MORE CHANNELSMAY BE NEEDED
THAN THE MIG SIZE INDICATES
SUBTLETIES (1)
RRC-06
10 requirements
GIVEN REQ
REQs IC with
MIG SIZE 5
MIG SIZE 4
MIG SIZE 4 MORAL :SOMETIMES
LARGE MIGsMAY HIDE SMALLER
MIGs
SUBTLETIES (2)
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Interconnected MIG: size 7 (= 5 + 2 )
A1
B1
E1
C1
D1
R2
S2
Admin '1'
Admin '2'
Figure 2: interconnected MIGs
MIG 2: size 2MIG 1: size 5
SUBTLETIES (3)
MORAL :INTERNAL SMALL
MIGS MAY COMBINE TO EXTERNAL
LARGE MIGS
RRC-06
5 REQUIREMENTS : A, B, C, D, EMIG SIZE = 2
3 CHANNELS : 1, 2, 3
NO XS REQS ???
REQs ACs
A 1,2,3
B 1
C 1
D 1
E 1
A B
C
D
E MORAL :RESTRICTIONS ON
ACCEPTABLE CHANNELS
MAY ALSO CAUSE
XS
3 1
1––
SUBTLETIES (4)
RRC-06
5 REQUIREMENTS : A, B, C, D, EMIG SIZE = 2
3 CHANNELS : 1, 2, 3
XS = 2 – 3 = - 1 ?????
REQs ACs
A 1,2,3
B 1
C 1
D 1
E 1
A B
C
D
E
CONSIDER SUBSETS (B,C) OR (C,D) OR (D,E)
MIG SIZE = 2; 1 AC
XS = 2 – 1 = 1
MORAL :MIG SUBSETS CAN LEAD TO LARGER
XS
SUBTLETIES (4 CONT)
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SUBTLETIES (5)
CH 17 CH 18 CH 19
56
7
12
34
MIG = 3
R5
R6
R7
1 AC R4
R3
R2
R1
1 AC
MIG = 5
MIG = 4
PROBLEM
XS = 2
PROBLEM
XS = 3
LET’S LOOK AT REQ NUMBER “5” MORAL :
ADDING ACs CAN LEAD TO
LARGER XS
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RSD (1)RELATIVE SPECTRUM DEMAND
CASE AMIG = 50 = MCHANNELS = 49 = C
XS = 50 – 49 = 1
CASE BMIG = 2 = MCHANNELS = 1 = C
XS = 2 – 1 = 1
RSD M/C 100 %CASE A: RSD = 50/49 x 100 = 102 %
CASE B: RSD = 2/1 x 100 = 200 %
XS CAN BE REDUCED BY RESOLVING 1 IC AMONGST
1225 ICS:
MORE ‘FLEXIBILITY’
XS CAN BE REDUCED BY RESOLVING 1 IC AMONGST
1 IC:
LESS ‘FLEXIBILITY’
RRC-06
XS M – C
RSD M/C 100 %
RSD (2)RELATIVE SPECTRUM DEMAND
DRAFT PLAN BAND IV/VOTHER CASES
M = 50 C = 25 : XS = 25 , RSD = 200 %
M = 196 C = 49 : XS = 147 , RSD = 400 %
M = 35 C = 1 : XS = 34 , RSD = 3500 %
M = 42 C = 49 : XS = (- 7) , RSD = 85 %
M = 358 C = 49 : XS = 309 , RSD = 731 %
RRC-06BIG MIG ZONE
WHAT THEY LOOK LIKE (1)
EXAMPLE FROM 1ST PLANNING EXERCISE
RRC-06
MIG size = 227RSD = 463 %
CLOSER LOOK
WHAT THEY LOOK LIKE (2)
SOME MIGS HAVE SIZE 358 IN THE DRAFT PLAN!!
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COMPLICATIONSUHF vs. VHF
UHF: UNIFORM CHANNELING 4 ACs = 4 x 8 MHz = 32 MHz
MIG SIZE = 10 10 x 8 MHz = 80 MHz SPECTRUM NEEDED
XS = 10 – 4 = 6 REQS = 48 MHz = 10 x 8 – 4 x 8
RSD = 10/4 x 100 = 250% = (10 x 8)/(4 x 8) x 100
VHF: NON-UNIFORM CHANNEL WIDTH 4 ACs = 4 x ? MHz
MIG SIZE = 10 10 x ? MHz SPECTRUM NEEDED
ACs CAN BE 1.75, 7, OR 8 MHz WIDEMIGs CAN CONSIST OF DAB (1.75), DVB (7), DVB (8 MHz)
XS = SPECTRUM NEEDED–SPECTRUM AVAILABLE
RSD = (SPEC NEEDED)/(SPEC AVAIL)x100
RRC-06
MIG CONCLUSIONS1. MIGs ARE A SIMPLIFICATION OF A COMPLEX PROBLEM
2. MIGs ARE USED TO PINPOINT DIFFICULT PLANNING SITUATIONS
3. MIGs INDICATE MORE REQUIREMENTS THAN THE AVAILABLE SPECTRUM CAN HOLD
4. MIGs CAN BE RESOLVED BY • REDUCING THE NUMBER OF REQUIREMENTS• INCREASING THE NUMBER OF ACCEPTABLE CHANNELS• ACCEPTING INTERFERENCE• ACCEPTING SMALLER COVERAGE AREAS ...
5. RESOLUTION OF ONE MIG MAY REVEAL THE EXISTENCE OF ANOTHER MIG, INVOLVING THE SAME REQ
6. MORE EXACT METHODS TO DETERMINE RSD SOUGHT
7. MIGs ARE NOT JUST ‘THE OTHER GUY’S PROBLEM’
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2. SYNTHESIS
1. AIM ALL REQUIREMENTS ASSIGNED
MAXIMUM NUMBER ASSIGNED
2. CONSTRAINTS AMOUNT OF SPECTRUM
NUMBER OF REQUIREMENTS
ALL REQUIREMENTS “EQUAL”
NO “FAVOURITES”, NO “PRIORITIES”
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3. EXCESS & EQUITABLE ACCESS
1. NO EXCESS ALL REQUIREMENTS SATISFIED
EQUITABLE ACCESS TO SPECTRUM
2. EXCESS NOT ALL REQUIREMENTS SATISFIED
NON-EQUITABLE ACCESS
SIMPLE SELF-CONTAINED EXAMPLES TO ILLUSTRATE THESE POINTS
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MIG size = 44 channels
A B
EQUITABLE DISTRIBUTION
PROBABILITIES
2 - 100.0 %
4
23
1
NO EXCESS REQUIREMENTS
PROBABILITIES
2 - 100.0 %
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EXCESS REQUIREMENTS
A B
MIG size = 84 channels
PROBABILITIES
0 - 1.4 %
1 - 22.9 %
2 - 51.4 %
3 - 22.9 %
4 - 1.4 %
4
23
1
4
2
3
1
PROBABILITIES
0 - 1.4 %
1 - 22.9 %
2 - 51.4 %
3 - 22.9 %
4 - 1.4 %
ONLY 4 CAN BE
ASSIGNED
RRC-06
SUPER-EXCESS REQUIREMENTS
MIG size = 124 channels
A B
4
2
3
1
4
2
3
1
PROBABILITIES
0 - 0.2 %
1 - 6.5 %
2 - 33.9 %
3 - 45.3 %
4 - 14.1 %
PROBABILITIES
0 - 14.1 %
1 - 45.3 %
2 - 33.9 %
3 - 6.5 %
4 - 0.2 %
ONLY 4 CAN BE
ASSIGNED
“EQUITABLE ACCESS”
DESTROYED
RRC-06
A B
C
16
16
16
MIG SIZE = 48ACs = 49
100% PROBABILITYA : 16 CHANNELsB : 16 CHANNELsC : 16 CHANNELs
THIS IS “EQUITABLE
ACCESS”
RRC-06
A B
C
50
50
50
MIG SIZE = 150ACs = 49
98% PROBABILITYA, B, C : 11 – 22 CHANs
IS THIS “EQUITABLE ACCESS” ???
12% : 15, 16, 18 7% : 16, 16, 176% : 15, 17, 17
ONLY 49 CAN BE
ASSIGNED
RRC-06
A B
C
200
100
50
MIG SIZE = 350ACs = 49
98% PROBABILITY50 : 2 – 12 CHANs100 : 8 – 20 CHANs200 : 21 – 35 CHANs
THIS IS NOT “EQUITABLE
ACCESS”
ONLY 49 CAN BE
ASSIGNED
RRC-06
XS CONCLUSIONS
1. EXCESS SUBMISSIONS NO INCREASE THE NUMBER OF SATISFIED REQUIREMENTS OVERALL
2. EXCESS SUBMISSIONS DISTORT THE DISTRIBUTION OF SATISFIED REQUIREMENTS
3. EXCESS SUBMISSIONS DESTROY EQUITABLE EXCESS
4. EXCESS SUBMISSIONS INCREASE COORDINATION
5. EXCESS SUBMISSIONS INCREASE DISAPOINTMENT
RRC-06
MI G
DON’T LET
THE MIGs
SHOOT YOU DOWN !!!
TAKE HEART
RRC-06
MIG, XS, EA
Terry O’Leary
THANK YOU!
NO
EXCESS
TIME