AN ORGANIZATION-BASED CACHE MECHANISM FOR SUPPORTING PCS NUMBER PORTABILITY SERVICE

摘要

The rapidly growth of PCS market promotes the number portability (NP) service becoming essential to enhancing fair competition among operators. However, the existed NP solutions face the same problems of huge NP database (NPDB), long delay time of portable number translation, and extra communication resource consumption. Although researches pointed to caches can be utilized to alleviate the workload of NPDB and to reduce NP call processing delay, it doesn't fit for the mobile communication system. For large organizations, members move among the working space or the subsidiaries, many mobile calls are made between organization members. Furthermore, organizations usually have frequently contact targets, calls made from an organization often have locality. If caches are applied to organization-based mobile telecommunication components, the efficiency of NP service can be improved. In this paper, we propose an operation model of applying organization-based caches to the public mobile communication system. Besides, the time for NP call setup is investigated to state the feasibility and the effect of organization-based caches in the mobile communication system.