Research And Application Of IP Based Colorful Ring Back Tone

CRBT is the personalized ring tone service which introduced by the individual operator.It is a service customized by called user, which provide a pleasant music or greeting insteadof a normal ring back tone to the calling subscriber. What the calling subscriber heard is nolonger the same pattern of traditional ring back tone. It can eliminate the sense of fatigue inthe period of waiting by the calling subscriber. Ring tone service often uses TDM mode torealize bearing. MMS business continue to grow and develop. The technical development isbased on continuous exploration and innovation. Conventional electrical communicationprotocol are constantly being defined and perfect. Most of the current service is based onthe IP mode. IP makes users more clearly and more concrete. It provides more scientificapproach to the telecommunication promotion through the classification of user group. Theresearch and application of the equipment can give the operator more broad marketprospects. CRBT is divided into two parts: the management node and calling node. Theformer is responsible for ring tone users’ expenses, users’ order change operation, inquiringring tone setting, personal ring tone management, group management and modifyingpassword, etc. The latter manages playing different tones for different callers and groups,ring tones at different times of the day, playing tones randomly and broadcasting into thesystem default ring tones, etc.TD-SCDMA is the3G technology for China mainland version. The standard isdeveloped by the People’s Republic of China, which has independent intellectual propertyrights. In late90s, Datang Telecom(China Ministry of Posts and TelecommunicationsScience and Technology Research Institute) applied to the telecommunication technologyalliance, which relies on SCDMA technology in Siemens.3G is featured of high efficienceand low divergence, known as health communication protocol. This technology combinesmany features of wireless communication technologies and makes a good balance of thefrequency utilization ratio, business ability support and cost savings. Since amount of ChinaTelecom users is relatively large, we must consider the investment scale in the constructionof3G network and save the cost without affecting the operation of the system. At the sametime, in order to have good compatibility with existing equipment and the GSM modecommunication equipment is easy to3G migration,3G technology don’t graduate to2.5G in China.Because the mobile core IP bearer network gradually matures, it is a trend that businessmoves close to it. In order to achieve different business integration, we must provide a newset of IP-based system. IP mode ring tone can well integrate with mobile IP core network,which provides business support. The function provided by ring tone is to make warningtone replaced with personalized music and user-defined record. These auxiliary systemprovides many kinds of functions, such as opening and closing of the ring tone, recordingand uploading of the user-defined record, which can let every use set up their own information. This system usually offer monthly subscription billing. As CRBT service is apublic telecommunication growth business, the system must be constructed in an openmode to achieve convergence between the platforms and business promotion. Thedevelopment principle is to provide a unified interface, communication protocol, gatewayaddress and other information, to share third-party business, to make it easier for thecontent providers to join ranks of business promotion and lay a good foundation for thesystem operation. CRBT business will gradually increase to meet the needs of differentusers and save costs. It is a continuous process to update and maintenance the system. Inthe early development process, we must fully consider good scalability issue and realizelocal changes which do not affect the historical version. The establishment of the newfeatures do not change the basic structure and the update of the original functions also donot affect the hardware equipment target. A good scalability can make development of theperformance and function guaranteed.