Roamer direct dialing (RDD)

Mobile communication helps people communicate anytime and anywhere. We can use mobile not only in registering country but also in any countries by using international roaming (IR) service. Even if the IR is convenient for user, the charging for making and receiving calls is quite high. Especially, when you are in a roaming country, any caller in the roaming country has to make an international call to your home country and be responsible for international direct dialing (IDD) charging. Moreover, you have to be charged for IDD from your country to the roaming country as well. In this paper, the solution called roamer direct dialing (RDD) to reduce high charging and call looping of an IR call is proposed. It is used for the optimal routing of an IR call by checking roamer location and its profiles then directly routing the call to the roamer as a local call. Roamers call is charged as a local call instead of IDD. Also, any calls from a local caller in the roaming country to a roamer are charged at lower price. The IR call charging is reduced up to 40% and the quality of call is much better due to the local routing call being concerned.