Mobile communication system with access function to computer network
US5983090A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 1, 1997 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Apr 1, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W8/26
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a mobile communication system, when a mobile station (PS1 to PSj) makes a request for connection to a service provider (SP), a base station (BS1 to BSn) acquires an IP address "IP1" assigned for the base stations and assigns to the requesting mobile station an IP address "IP2" for the mobile stations that has been acquired in advance in place of the IP address "IP1". When data transfer is started, the base station changes the source address in data sent by the mobile station from "IP2" to "IP1" and then transfers the resulting data to the service provider. On the other hand, the base station changes the destination address of data sent by the service provider from "IP1" for the base stations to "IP2" for the mobile stations for subsequent transfer to the mobile station.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.