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Kwangwoon Univ. Wireless and Mobile Network Architectures Mobile Number Portability

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Presentation on theme: "Kwangwoon Univ. Wireless and Mobile Network Architectures Mobile Number Portability"— Presentation transcript:

1 Kwangwoon Univ. Wireless and Mobile Network Architectures Mobile Number Portability

2 Kwangwoon Univ. Wireless and Mobile Network Architectures Introduction Number portability Number portability Subscriber to keep a unique telephone number Enhance fair competition among telco. To improve customer service quality Three kinds of number portability Three kinds of number portability Location portability Service portability Operator portability CLEC (competitive local exchange carrier) CLEC (competitive local exchange carrier) ILEC (incumbent local exchange carrier) ILEC (incumbent local exchange carrier)

3 Kwangwoon Univ. Wireless and Mobile Network Architectures 15.1 Fixed-Network Number Portability (1/2)

4 Kwangwoon Univ. Wireless and Mobile Network Architectures 15.1 Fixed-Network Number Portability(2/2) 15.1 Fixed-Network Number Portability(2/2) NUMBER PORTABILITY SOLUTION ROUTING INDEPENDENCE EXTRA CALL SETUP COST INITIAL SYSTEM SETUP COST Call Forwarding low pc t low Call Drop-back medium cscscscsmedium Query-on-Releasemedium p (c s + c d ) high All-Call-Queryhigh cscscscshigh Extra call setup costs Initial System Setup Costs Customer Transfer Costs

5 Kwangwoon Univ. Wireless and Mobile Network Architectures

6 Kwangwoon Univ. Wireless and Mobile Network Architectures 15.1 Cost Recovery NUMBER PORTABILITY SOLUTION CUSTOMER TRANSFER COST EXTRA CALL SETUP COST INITIAL SYSTEM SETUP COST Call Forwarding r -> d ; c -> r o -> d own Call Drop-back r -> d ; c -> r o -> d own Query-on-Release r -> d, db ;c -> r o -> d, o -> db own All-Call-Query r -> db ;c -> r o -> db own r : recipient operator r : recipient operator d : donor operator d : donor operator o : origination operator o : origination operator c : customer c : customer db : the party who manages number portability database db : the party who manages number portability database

7 Kwangwoon Univ. Wireless and Mobile Network Architectures 15.2 Number Portability for Mobile Networks Mobile phone is associated with two number Mobile phone is associated with two number Directory number (MSISDN in GSM) Identification number (IMSI in GSM) MSISDN and IMSI pair is assigned to the user MIN (mobile identification number),MDN ( mobile directory number) are used in EIA/TIA IS-41 based system Typically assume that both MIN and MDN have the same value To support portability, separation of MIN and MDN is required Location update Mobile call origination Mobile call termination

8 Kwangwoon Univ. Wireless and Mobile Network Architectures 15.3 Mobile Number Portability Mechanisms Two restriction Two restriction The GMSC must be in the call path for the provision of special features and services, as well as for billing The originating switch does not have the capability of query the HLR database, which must be done by GMSC Simplified GSM call termination procedure and tromboning routing

9 Kwangwoon Univ. Wireless and Mobile Network Architectures Signaling Relay Approach 1/2 (SRA 1/2) SRA 1 SRA 2 IRN (Intermediate Routing Number)

10 Kwangwoon Univ. Wireless and Mobile Network Architectures Tromboning trunk setup in SRF 2

11 Kwangwoon Univ. Wireless and Mobile Network Architectures All-Call-Query Approach 1/2 (ACQ 1/2) ACQ1 ACQ2

12 Kwangwoon Univ. Wireless and Mobile Network Architectures 15.4 Implementation Costs for mobile Number portability NUMBER PORTABILITY SOLUTION ROUTING INDEPENDENCE EXTRA CALL SETUP COST INITIAL SYSTEM SETUP COST SRA 1 low cscscscsmedium SRA 2 low 2c s + pc t medium ACQ 1 high cscscscsmedium ACQ 2 high c s - c t medium NUMBER PORTABILITY SOLUTION CUSTOMER TRANSFER COST EXTRA CALL SETUP COST INITIAL SYSTEM SETUP COST SRA 1 r -> d (db) ; c -> r o -> d, d -> db own SRA 2 r -> d (db) ; c -> r o -> d, r, d -> db own ACQ 1 r -> db ;c -> r o -> db own ACQ 2 r -> db ;c -> r o -> db own Comparison of Mobile Number portability Solution Cost Recovery mobile number portability solutions


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