5 Calculate p 29 (Call this variable, x) (See footnote ) 100101100 300 – x = 812 - 512 6 Calculate p + 29 (Call this variable, y) 10100101100 1324 y = 812 + 512 7 Test r against x and y and set s accordingly 1100101100 812 If r < x then s = r + 210 If r > y then s = 210 – Else s = r 300 < 812 < 1324, therefore s = r 8 Set deduced Originator Counter = (q + s) *232 10,560,878,642,999,590,912 9 Set deduced UTRN Counter as most significant 32 bits of Deduced 2,458,896,172 Originator Counter Table 27: Derivation of the UTRN Counter from the PTUT Truncated UTRN Counter a worked example –
5 Calculate p – 29 (Call this variable, x) (See footnote ) x = 812 - 512 100101100 300 6 Calculate p + 29 (Call this variable, y) y = 812 + 512 10100101100 1324 7 Test r against x and y and set s accordingly If r < x then s = r + 210 If r > y then s = – 210 Else s = r 300 < 812 < 1324, therefore s = r 1100101100 812 8 Set deduced Originator Counter = (q + s) *232 10,560,878,642,999,590,912 9 Set deduced UTRN Counter as most significant 32 bits of Deduced Originator Counter 2,458,896,172 Table 27: Derivation of the UTRN Counter from the PTUT Truncated UTRN Counter – a worked example
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