Inter-system handover using legacy interface
US8553643B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2006 |
| Grant date | Oct 8, 2013 |
| Priority date | — |
| Expiry date | Jul 13, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W92/24
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Techniques for performing inter-system handover are described. An Access Gateway (AGW) sends a message requesting handover of a user equipment (UE) from a first radio access network (RAN) to a second RAN. The message is sent to an Inter Access System (inter-AS) Anchor for the first RAN communicating with an SGSN for the second RAN via a Gn interface. The Inter-AS Anchor and SGSN exchange messages via the Gn interface, and the Inter-AS Anchor forwards the messages to the AGW to handover the UE from the first RAN to the second RAN. The SGSN sees the Inter-AS Anchor as another SGSN for the handover and as a GGSN after the handover. This allows the inter-system handover to be achieved with an inter-SGSN SRNS relocation procedure used for handover between two SGSNs, which reduces impact on the SGSN to support the inter-system handover.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.