The Home Location Register In Front Of The User Selective Transfer Of Business Applications And Research

Mobile communication has developed from 1980's and it becomes popular rapidly. It is said that by now the total number of mobile communication subscribers is more than 400 million. This paper mainly discusses the function, constitution of HLR (Home Location Register) of CDMA. In addition, the design and realization of USCF (User Selective Call Forwarding) in HLR is described in this paper.' Firstly, the network model, structure, features and the key technologies of CDMA, together with the protocols and messages applied in CDMA systems are introduced in this paper. Based on these, Home Location Register (HLR), as the key part of the network subsystem in CDMA is further described secondly. Its main functions in communication support, mobile management and security management are introduced. Then we divide HLR into three modules, Signal Processing Unit (SPU), HLR Database (HDB) and Service Management Unit (SMU) and the function and the structure of each module are also introduced in detail in this paper.User Selective Call Forwarding (USCF) is one new service defined by 3GPP2. In this paper, we will use the design and realization of USCF as a specific example to illuminate how to apply HLR to complete services. We present one subject to design and realize USCF with ORACLE and PRO*C. Then how to realize the functions of USCF, including inserting-user, inserting-user by profile, querying and modifying users' USCF data is explained in detail.In addition, the features of HLR are analyzed and the plan to design multi-process and multi-thread HLR is also summarized. And several measures to increase the efficiency of HLR, such as creating index in tables, deleting redundancy data and improving the structures of messages and the design of parameters are presented.