Research And Implementation Of The China Unicom Number Portability Solution

Number portability refers to the ability of telephone users to retain their telephone number when they change their chosen network operator and service provider, their location, or their service. As a kind of promote telecommunications fair market competition technology and policies, Number Portability Not only improves users'selection ability, But also helps telecom operators improving service quality and innovative services for customers. China's telecoms industry is in the beginning period of 3G development, Number portability will help promote mobile users of rapid flow, expand 3G customer base, accelerate operators in 3G investment cost recovery in China, so as to promote the development of 3GThe author research and analyzes the principle of Number portability and Participate in implementation of Number portability (Core network parameters data changes and some test works).The paper at first brief introduces the current domestic telecommunication network development situation, presented on the value and social significance of Number portability; Then introduces the basic concepts and classification of Number portability, as well as the introduction of the mobile Number portability system; Then analysis and research on international mobile number portability system solutions(based on Switch, based on CAMEL, based on SRF), and summarizes advantages and disadvantages of the three traditional mobile number portability system solutions; Finally the paper deeply studied China Unicom number portability system solutions(the overall structure, the main function of unit and Interface protocols), analysis and research the principle and the process of voice calls, text messaging and MMS, and describes the implementation of number portability solutions working experience and the problems encountered in testing.