Handover of wireless calls between systems supporting circuit and packet call models
US6721565B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2000 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Oct 26, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W36/00224
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An improved wireless network provides intersystem handoffs between existing circuit wireless systems and packet systems. A packet wireless system is enhanced to provide translation between circuit and packet call models. A Media Gateway translates bearer traffic between formats used in each system. The Media Gateway, a Media Gateway Control Function, and an associated Call State Control Function, cooperate to emulate the behavior of a circuit wireless system, so that when interoperating with conventional circuit systems, the packet system appears to be another circuit wireless system. Where necessary, the Media Gateway, Media Gateway Control Function, and Call State Control Function further cooperate to emulate the functions of an anchor MSC of a circuit wireless system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.