VLR (Visitor Location Register): Location for visiting position registers. Is a database, which is stored waries domain MS (collectively referred to visit customers) LaiHua, to call the required information retrieval words and user signing business and additional business information, such as customer number, the location area of recognition, to provide customer service parameters.
Visit user position registers (VLR) serves their control area of mobile users, stored into its control area has been registered the mobile user related information for registered mobile users provide the necessary conditions of establishing call succeeded. From the mobile user VLR belonging user position hosting (HLR) was obtained and storage necessary data. Once the mobile users leave the VLR, reassemble the control area in another VLR registration, the original VLR will be cancelled temporary record of the mobile user data. Therefore, VLR can see as a dynamic user database.
