2. RRC-06 MIGS, EXCESS and EQUITABLE ACCESS EBU TECHNICAL DEPARTMENT TERRY OLEARY

3. RRC-06 TOPICS 1. MIG 2. SYNTHESIS 3. EXCESS & EQUITABLE ACCESS

4. 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

5. RRC-06 MIG MUTUALLY INCOMPATIBLE GROUP 2 requirements, compatible less than 2 channels needed 2 requirements, IN-compatible 2 channels needed 11 12 12 3 2-MIG 3 requirements, IN-compatible 3 channels needed 3-MIG 12 1 3 requirements less than 3 channels needed NOT a MIG 4 requirements, IN-compatible 4 channels needed 4-MIG 23 4 1 4 requirements less than 4 channels needed NOT a MIG 23 2 1

6. RRC-06 THIS IS A BIGGER MIG WITH 13 REQS Q: HOW MANY CHANNELS REQUIRED? BIGMIGBIGMIG

7. RRC-06 XS E X CES S DRAFT PLAN: BAND IV/V MIG SIZE = M = 358 # CHANNELS = C = 49 EXCESS = XS = M – C = 358 – 49 = 309 CASE B MIG = 4 ONLY 2 CHANNELS: 1, 2 2 REQS CAN HAVE A CHANNEL 2 REQS CANNOT HAVE A CHANNEL THERE IS AN EXCESS OF 2 REQS EXCESS = XS = 4 – 2 = 2 CASE A MIG = 4 5 CHANNELS: 1, 2, 3, 4, 5 EACH REQ CAN HAVE A CHANNEL WITH NO INCOMPATIBILITY THERE IS NO EXCESS IN REQS RECALL: BIG MIG SIZE 13

8. RRC-06 NO 3-MIG 2-MIGs 2 CHANNELS ? 1 2 1 2 ? ? = 3 MORAL : SOMETIMES MORE CHANNELS MAY BE NEEDED THAN THE MIG SIZE INDICATES SUBTLETIES (1)

9. RRC-06 10 requirements GIVEN REQ REQs IC with MIG SIZE 5 MIG SIZE 4 MORAL : SOMETIMES LARGE MIGs MAY HIDE SMALLER MIGs SUBTLETIES (2)

10. RRC-06 Interconnected MIG: size 7 (= 5 + 2 ) A1A1 B1B1 E1E1 C1C1 D1D1 R2R2 S2S2 Admin '1' Admin '2' Figure 2: interconnected MIGs MIG 2: size 2 MIG 1: size 5 SUBTLETIES (3) MORAL : INTERNAL SMALL MIGS MAY COMBINE TO EXTERNAL LARGE MIGS

11. RRC-06 5 REQUIREMENTS : A, B, C, D, E MIG SIZE = 2 3 CHANNELS : 1, 2, 3 NO XS REQS ??? REQsACs A1,2,3 B1 C1 D1 E1 AB C D E MORAL : RESTRICTIONS ON ACCEPTABLE CHANNELS MAY ALSO CAUSE XS 31 1 –– SUBTLETIES (4)

12. RRC-06 5 REQUIREMENTS : A, B, C, D, E MIG SIZE = 2 3 CHANNELS : 1, 2, 3 XS = 2 – 3 = - 1 ????? REQsACs A1,2,3 B1 C1 D1 E1 AB 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)

13. RRC-06 SUBTLETIES (5) CH 17 CH 18CH 19 5 6 7 1 2 3 4 MIG = 3 R5 R6 R7 1 AC R4 R3 R2 R1 1 AC MIG = 5 MIG = 4 PROBLEM XS = 2 PROBLEM XS = 3 LETS LOOK AT REQ NUMBER 5 MORAL : ADDING ACs CAN LEAD TO LARGER XS

14. RRC-06 RSD (1) R ELATIVE S PECTRUM D EMAND CASE A MIG = 50 = M CHANNELS = 49 = C XS = 50 – 49 = 1 CASE B MIG = 2 = M CHANNELS = 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

15. RRC-06 XS M – C RSD M/C 100 % RSD (2) R ELATIVE S PECTRUM D EMAND DRAFT PLAN BAND IV/V OTHER 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 %

16. RRC-06 BIG MIG ZONE WHAT THEY LOOK LIKE (1) EXAMPLE FROM 1 ST PLANNING EXERCISE

17. RRC-06 MIG size = 227 RSD = 463 % CLOSER LOOK WHAT THEY LOOK LIKE (2) SOME MIGS HAVE SIZE 358 IN THE DRAFT PLAN!!

18. RRC-06 COMPLICATIONS UHF 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 WIDE MIGs CAN CONSIST OF DAB (1.75), DVB (7), DVB (8 MHz) XS = SPECTRUM NEEDED–SPECTRUM AVAILABLE RSD = (SPEC NEEDED)/(SPEC AVAIL)x100

19. RRC-06 MIG CONCLUSIONS 1.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 GUYS PROBLEM

20. RRC-06 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

21. RRC-06 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

22. RRC-06 MIG size = 4 4 channels A B EQUITABLE DISTRIBUTION PROBABILITIES 2 - 100.0 % 4 23 1 NO EXCESS REQUIREMENTS PROBABILITIES 2 - 100.0 %

23. RRC-06 EXCESS REQUIREMENTS A B MIG size = 8 4 channels PROBABILITIES 0 - 1.4 % 1 - 22.9 % 2 - 51.4 % 3 - 22.9 % 4 - 1.4 % 4 2 3 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

24. RRC-06 EXCESS REQUIREMENTS A B MIG size = 5 4 channels RESTRICTED AVAILABLE CHANs + [1] [2] [3] [4] RESTRICTING ACs WILL NOT INCREASE THE PROBABILITY OF ASSIGNMENT BUT IT WILL DECREASE THE FLEXIBILITY OF THE SYNTHESIS 2 3 1 4 ONLY 4 CAN BE ASSIGNED

25. RRC-06 SUPER-EXCESS REQUIREMENTS MIG size = 12 4 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

26. RRC-06 A B C 16 MIG SIZE = 48 ACs = 49 100% PROBABILITY A : 16 CHANNELs B : 16 CHANNELs C : 16 CHANNELs THIS IS EQUITABLE ACCESS

27. RRC-06 A B C 50 MIG SIZE = 150 ACs = 49 98% PROBABILITY A, B, C : 11 – 22 CHANs IS THIS EQUITABLE ACCESS ??? 12% : 15, 16, 18 7% : 16, 16, 17 6% : 15, 17, 17 ONLY 49 CAN BE ASSIGNED

28. RRC-06 A B C 200 100 50 MIG SIZE = 350 ACs = 49 98% PROBABILITY 50 : 2 – 12 CHANs 100 : 8 – 20 CHANs 200 : 21 – 35 CHANs THIS IS NOT EQUITABLE ACCESS ONLY 49 CAN BE ASSIGNED

29. 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

30. RRC-06 M I G DONT LET THE MIG s SHOOT YOU DOWN !!! TAKE HEART

31. RRC-06 MIG, XS, EA Terry OLeary THANK YOU! NO EXCESS TIME