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Signaling bandwidth on Iu interface:
Total bandwidth of signaling on Iu interface (Mbit/s) = total number of MSC
subscribers (k) * S (message throughput of single process * number of processes)
* 8 /3600 / 1000= total number of MSC subscribers * {[average BHCA per
subscriber in busy hours * (ratio of calling subscribers in current office * number
of message bytes in MO call process + ratio of called subscribers in current office
* number of message bytes in MT call process)] + number of location updates per
subscriber in busy hours * number of message bytes in location update process +
number of IMSI detachments per subscriber in busy hours * number of message
bytes in IMSI detachment process + number of MO SM per subscriber in busy
hours * number of message bytes in MO SM process + number of MT SM per
subscriber in busy hours * number of message bytes in MT SM process + (number
of intra-office handovers per subscriber in busy hours + number of inter-office
handovers per subscriber in busy hours/2) * number of message bytes in MO
handover process + number of message bytes in MT handover process)} * 8 / 3600
/1000
Bandwidth of signaling to RNC (Mbit/s) = ratio of RNC traffic * total signaling
bandwidth on Iu interface (Mbit/s)
Where, Ratio of RNC traffic = RNC traffic / (total number of MSC subscribers (k) *
average traffic per subscriber) | 
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