Aicent, Inc. Proprietary 1 Zidan Lian Director of Product Management Aicent, Inc. Current Outstanding CRX Data Clearing Interim Accounting Implementation Disputes

Aicent, Inc. Proprietary and Confidential Bridging the Mobile World TM 2 Outstanding Issues in CRX Data Clearing Different accounting algorithm Unsynchronized data validation rules Interim accounting support difference Different records processing rules Miss-matched rounding options Lack of reconciliation process

Aicent, Inc. Proprietary and Confidential Bridging the Mobile World TM 3 Interim Accounting 101 “Long Session” consists of multiple accounting sessions (“short sessions”) that share the same correlation ID When no AAA records are lost, no disputes and problem: Volume_of_Long-Session = Volume_Stop-1 + Volume_Stop-2

Aicent, Inc. Proprietary and Confidential Bridging the Mobile World TM 4 Two Major Accounting Algorithms Accounting algorithm-1 recognizes interim accounting records Count every accounting UDR records including interim accounting UP records until the FINAL STOP record is received Accounting algorithm-2 does not recognize interim accounting records Interim UP records will be discarded Count a session only if the FINAL STOP is received  Should a short session STOP is lost, the volume of the entire short session will not be counted  Should a long session STOP – FINAL STOP is lost, the volume of the entire long session will not be counted

Aicent, Inc. Proprietary and Confidential Bridging the Mobile World TM 5 Difference When FINAL STOP Is Missing Interim Accounting is more accurate to prevent the revenue loss from START-1 to UP5 when STOP-2 (the FINAL STOP of the long session) is missing

Aicent, Inc. Proprietary and Confidential Bridging the Mobile World TM 6 When Short Session STOP Is Missing Short Session is more accurate to prevent the revenue loss from START-1 to STOP-1 when STOP-1 (the short session stop) is missing

Aicent, Inc. Proprietary and Confidential Bridging the Mobile World TM 7 CDG IRT Specification CDG document implicitly requires CRX support interim accounting CDG Doc 94: The CRX provider shall perform UDR accommodation; that is, if a packet data session prolongs more than one day, the daily usage volume shall be calculated from the latest UDR of the current day and the latest UDR of the previous day. If the Accounting Stop record is not founded in a day, the latest Interim-Update record shall be used to determine the session of each day.

Aicent, Inc. Proprietary and Confidential Bridging the Mobile World TM 8 Significance? We once observed as much as ~2% missing STOPs early 2008 We observed as much as 0.57% missing FINAL STOPs on one roaming route between Jan 1 st 2009 and Jan 15 th 2009 Mobile Operators shall make a decision on whether they would prefer an algorithm counting all UDRs Aicent believes all accounting records matter from serving operator’s point of view