Patent ID: 7769380
Filing Date: 2010-08-03
Classification: H04W

Abstract:
1. A method for reducing the rate of registration in CDMA-based mobile networks, comprising the steps of: providing a mobile device; defining a first registration area and a plurality of secondary registration areas; defining a signal strength difference threshold; providing a database associated with the mobile device, the database including geographic coordinates defining respective boundaries of the first and secondary registration areas; initially positioning the mobile device in the first registration area, the mobile device being in communication with a first base station associated with the first registration area; providing first and a plurality of secondary registration pilot signals respectively associated with the first and secondary registration areas; scanning for a new registration pilot signal associated with one of the plurality of secondary registration areas; receiving the new registration pilot signal and making a first measurement of the strength of the new registration pilot signal; determining the geographic location of the mobile device, wherein said step of determining the geographic location of the mobile device includes determination of whether the mobile device is in communication with the global positioning system, wherein if the mobile device is in communication with the global positioning system, the geographic location of the mobile device is defined by a set of global positioning coordinates received by the mobile device from the global positioning system, wherein if the mobile device is not in communication with the global positioning system, the geographic location of the mobile device is determined by measuring the strength of the first registration pilot signal and comparing the strength of the first registration pilot signal with the strength of the new registration pilot signal, wherein if the strength of the first registration pilot signal is greater than the strength of the second registration pilot signal, the geographic location of the mobile device is set within the boundary of the first registration area, and if the strength of the new registration pilot signal is greater than the strength of the first registration pilot signal, the geographic location of the mobile device is set to a geographic location within the particular one of the secondary registration areas; comparing the geographic location of the mobile device with the geographic coordinates included in the database; and determining whether the mobile device is within the boundary of the first registration area or within the boundary of one of the secondary registration areas, wherein if the mobile device is within the boundary of one of the secondary registration areas, the mobile device registers with a respective secondary base station associated with the particular one of the secondary registration areas, the mobile device returning to said step of scanning for a new registration pilot signal; wherein, if the mobile device is within the boundary of the first registration area, the mobile device makes a second measurement of the strength of the new registration pilot signal, and if the difference between the second measurement and the first measurement is less than the signal strength difference threshold, then the mobile device returns to said step of scanning for a new registration pilot signal, further, if the difference between the second measurement and the first measurement is greater than the signal strength difference threshold, then the mobile device returns to said step of determining the geographic location of the mobile device.