Roaming VAS (optimal routing)
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1) Optimal routing (OR) is a value-added service that allows calls between roaming subscribers within the same country to be directly routed between serving networks, avoiding international call legs and saving costs. 2) OR requires maintaining a real-time database of inbound roamers including location, serving network, and other data extracted from signaling messages. 3) Typical OR implementations route calls to a special platform housing the roamer database, which analyzes the destination and routes internally or obtains a local number from the destination network.
Roaming VAS (optimal routing)
- 1. Roaming Value-Added Services BY:Rawand Dlshad Jaf IREG Engineer
- 2. Roaming in GSM Network International roaming offers a great opportunity for wireless service providers to improve revenues and generate more profits. They are continuously exploring new ways to attract more roamers to their networks. As you know the roamer set the hand to network register automatically according to the Signal Strength, Reselection may be happens when the roamer moves and the Roamer don't have the loyally to any network out side home country. But the question is how we can attract the roamer to manually network selection The Ans .”by Cost of usage, Service , Discount,…ECT” And VAS
- 3. Optimal Routing What happens when Roamer calling another Roamer in the same Country? MSC/VLR HLR MSC/VLR 1-Dial B 2-Call route to home network MSC/VLR 3 6 3-Sending routin Info 6-Provide by MSRN. 4-asking MSRN 5-MSRN 8 Call Route to B B A Country X Country B
- 4. Optimal Routing This is surly not an efficient routing because is require tow international call legs , for that we need optimal routing (OR) as value add service to attract & retain Roamers in Visit net. OP allows a call to routed directly from originating MSC to MSC currently serving roamer for that the international call will be avoided saving cost and OP can be applied to following scenarios: 1- Inbound Roamer to Roamer call in same Country and network. 2- Inbound Roamer to Roamer call in same Country but other network. 3-A local Subscriber calling Inbound roamer in same network.
- 5. Implementation • Usually access code is used fallowed by the regular B party international number. • All the OR call are routed to a special Platform which enable the OR, there could be several different ways to implement OR in the network. • The three important requirement for any OR implementation are: 1. Acquire, maintain, and manage the data for all inbound roamers currently in the network in real time. 2. Analysis of the B party number to check if it is an inbound roamer currently in a network implementing OR or in any other PLMN within the same country, where the call could be routed locally. 3. If OR is possible, then acquire MSRN from the serving MSC to route the call locally.
- 6. The key roaming procedures, such as location update, insert subscriber data, authentication, and cancel location messages provide all the critical information to build the database for OR purposes (by extract the signaling messages from the CCS7 links carrying MAP traffic to partner networks). For example, by decod-ing a UL/ISD procedure, the following parameters can be extracted. ■ Subscriber’s IMSI ■ MSISDN ■ HLR address ■ Serving MSC/VLR address ■ Timestamp for first and subsequent UL How can I get a database for OR?
- 7. Typical implementation. (Roamers under Same Operator) Mobile/inbound RoamerMobile/inbound Roamer Fixed lineFixed line OR pattform OR pattform 1-IAM,B party number. 1-IAM,B party number. Roamer data base Roamer data base 2-Get IMSI <VLR/MSC> 2-Get IMSI <VLR/MSC> 3-IMSI, VLR/MSC3-IMSI, VLR/MSC MSCMSC VLRVLR 4-AskthMSRN 4-AskthMSRN 5-ResponseMSRN 5-ResponseMSRN 5-IAM (M SRN ) 5-IAM (M SRN ) B inbound RoamerB inbound Roamer <OR access code><B party international number><OR access code><B party international number>
- 8. Typical implementation. (Roamers in same country but under different Operators) Mobile/inbound RoamerMobile/inbound Roamer OR pattform OR pattform 1-IAM,B party number. 1-IAM,B party number. Roamer data base Roamer data base 2-Get IMSI <VLR/MSC> 2-Get IMSI <VLR/MSC> 3-HLR3-HLR MSCMSC VLRVLR 8-IAM (M SRN) 8-IAM (M SRN ) B inbound RoamerB inbound Roamer Fixed lineFixed line HLRHLR 4-SRI (MSISDN) 4-SRI (MSISDN) 5- Ask MSRN5- Ask MSRN 6- MSRN6- MSRN 7- MSRN 7- MSRN Home networkHome network