The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 26, 2002
Filed:
Apr. 10, 2000
Li-Fung Chang, Holmdel, NJ (US);
Vijay K. Varma, Holmdel, NJ (US);
Telcordia Technologies, Inc., Morristown, NJ (US);
Abstract
A method and system for providing seamless mobile IP connectivity between mobile stations (MS) connected to a PCS network via base stations (BS) connected to base station switching centers (BSCs). The BSCs are connected to a mobile station switching station (MSC) and are configured to direct voice traffic from the MS to the MSC. A gateway router (GR) is connected between the BSCs and the Internet and each BSC is configured as an IP data node. One or more subnets are defined, each of which includes at least one BSC. Each MS is assigned a permanent IP address and associated with a home subnet. When the system detects that the MS is connected to a BSC outside of its home subnet, it is assigned a care-of address to the MS to which IP data can be forwarded. IP data from the MS is routed through the GR. IP data directed to the MS is directed to the MS's permanent IP address. If the MS is connected to a BSC outside of its home subnet, the data traffic is forwarded to the MS's care-of address. A mobile station and base station controller for use in such a network is also presented.