WIN to CAMEL conversion methodology for Inter-standard Roaming for subscribers on Real Time Charging

Abstract

Migration of the CDMA and GSM networks worldwide to LTE is a long drawn process. Even after migration, the 2G/3G and the CDMA Networks will coexist and will prevail for years. So enabling roaming between CDMA and GSM network is an unending endeavour. As per CDG (CDMA Development Group) there are presently 560 million plus CDMA subscribers worldwide. While there is a defined standard for basic Inter-standard Roaming for actuating ANSI 41 to MAP conversions, the methodology for actuating a protocol conversion between CAMEL (GSM) to WIN (CDMA) is still not defined. CAMEL and WIN are the key protocols for Real Time Charging for prepaid customers. So the inter conversion of these two protocols is a must for the success of Inter standard roaming. This paper attempts to unfurl the technology for realising both way Interworking between WIN and CAMEL protocols to facilitate roaming for the prepaid customers and thereby enhance the roaming penetration.