US Patent 8463232 Accurate billing for services used across multiple serving nodes

A method, wireless service node, and wireless communication system, are provided to manage wireless service usage and service node migration in the wireless communication system. A registration request from a wireless device (108) is received. A charging session associated with the wireless device (108) is established with a billing server (124). Wireless service usage is associated with the wireless device (108). The wireless device (108) is determined to be migrating to a new wireless service node (114). Information associated with the current charging session is transferred to the new wireless service node (114). Following the transfer, the service usage information pertaining to the same session is maintained and transferred by the new wireless service node to the billing server at appropriate time intervals and as per dynamic rules set in the billing server.