EP1340388B1

5G,4G,3G,2G

Title

Method and apparatus for handoff of a wireless packet data services connection

Application Number:

EP20010995405

Publication Date:

13-10-2004

Current Assignee:

Family ID:

Application Date:

04-12-2001

Declaring Company:

Publication Country:

US

Priority Date:

06-12-2000

Title

Method and apparatus for handoff of a wireless packet data services connection

Application Number:

EP20010995405

Family ID:

Publication Country:

US

Publication Date:

13-10-2004

Application Date:

04-12-2001

Priority Date:

06-12-2000

Current Assignee:

Declaring Company:

Abstract  Abstract

A novel method and apparatus is disclosed for performing seamless handoff of a mobile station (MS) between Radio Access Networks (RANs) that use different types of wireless interfaces. The described embodiments enable an MS to handoff between different RANs without causing routing ambiguity and without substantial loss of network data. Upon moving from the coverage area of a first RAN using a first wireless interface to the coverage area of a second RAN using a second wireless interface an MS determines whether routing ambiguity may result from the change of RAN and based on the determination triggers a re-registration of its network address. A foreign agent (FA) within a packet data serving node (PDSN) monitors network address re-registrations are being created for the same MS. Based on this determination the PDSN terminates redundant R-P network connections resulting from movement of the MS between different RANs.

A novel method and apparatus is disclosed for performing seamless handoff of a mobile station (MS) between Radio Access Networks (RANs) that use different types of wireless interfaces. The described embodiments enable an MS to handoff between different RANs without causing routing ambiguity and without substantial loss of network data. Upon moving from the coverage area of a first RAN using a first wireless interface to the coverage area of a second RAN using a second wireless interface an MS determines whether routing ambiguity may result from the change of RAN and based on the determination triggers a re-registration of its network address. A foreign agent (FA) within a packet data serving node (PDSN) monitors network address re-registrations are being created for the same MS. Based on this determination the PDSN terminates redundant R-P network connections resulting from movement of the MS between different RANs.

Note:

The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)

The information in grey was provided by the patent holder

The information in purple was extracted from the FrandAvenue

Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.

Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.

Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.

Family member:related patents or applications that share a common priority or original filing.