Patent ID: 7953415
Filing Date: 2011-05-31
Classification: H04M,H04W

Abstract:
1. In a wireless communications network, a call processing method comprising: receiving a call to a directory number via a mobile switching center; checking whether number portability information for the directory number is stored in an internal portable directory number database in the mobile switching center, wherein the internal portable directory number database stores data relating to portable directory numbers, including their corresponding portability information such as an indication of whether the directory number is ported or not and an associated Location Routing Number if the directory number is a ported number; bypassing an external number portability database (NPDB) and routing the call based upon the number portability information for the directory number, when there is number portability information for the directory number stored in the portable directory number database; and when there is no number portability information for the directory number stored in the internal portable directory number database: