METHOD AND SYSTEM FOR TRANSFERRING A COMMUNICATION SESSION

• US 20070088835A1
• Filed: 12/07/2006
• Published: 04/19/2007
• Est. Priority Date: 10/20/2000
• Status: Active Grant

• Current Assignee: Uniloc 2017 LLC (SoftBank Group Corp.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: WU, Chiung-Hsien
• Granted Patent: US 7,739,392 B2
• Time in Patent Office: Days
• US Class Current: 709/227
• CPC Class Codes: H04L 63/083 using passwords cryptographic mechanisms or cryptographic arrangements for entity authentication using a predetermined code H04L9/3226
• CPC Class Codes: H04L 67/04 specially adapted for terminals or networks with limited capabilities; specially adapted for terminal portability
• CPC Class Codes: H04L 67/14 Session management for real-time applications in data packet communications networks H04L65/1066
• CPC Class Codes: H04L 67/288 Distributed intermediate devices, i.e. intermediate devices for interaction with other intermediate devices on the same level
• CPC Class Codes: H04L 67/565 Conversion or adaptation of application format or content adding application control or application functional data H04L67/561
• CPC Class Codes: H04L 67/5651 Reducing the amount or size of exchanged application data
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04W 36/12 Reselecting a serving backbone network switching or routing node
• CPC Class Codes: H04W 36/18 for allowing seamless reselection, e.g. soft reselection
• CPC Class Codes: H04W 36/36 by user or terminal equipment
• CPC Class Codes: H04W 88/181 Transcoding devices; Rate adaptation devices
• CPC Class Codes: H04W 88/182 Network node acting on behalf of an other network entity, e.g. proxy

Abstract

The invention relates to a method of and a system for transferring a communication session from one service area (101) to another (102), where each service area is associated with a transcoding proxy (111, 112) for transcoding communication sessions established in said service area to and from a format suitable for a mobile device (104). A gateway server (103) relays the communication session from a content server (105, 106, 107) via the appropriate transcoding proxy to the mobile device (104). When the mobile device (104) moves to the second service area (102), the second transcoding proxy (112) is contacted and session handling is transferred thereto. The transfer operation is transparent to the content server, so the session between mobile device (104) and content server (105, 106, 107) stays intact. The invention also relates to a mobile assistant server, a transcoding proxy and a mobile device for use in said system.

Claims

1-16. -16. (canceled)

17. A method comprising the steps of:

utilizing a communication network to transfer a relaying of a communication session from a first transcoding proxy to a second transcoding proxy, each transcoding proxy being associated with a different service area from a number of service areas, and receiving a transfer request message from a portable application in a particular service area; and

determining a group having proxies associated with one or more service areas near the particular service area,

wherein the transfer request message is transmittable to the transcoding proxies of the group and a transfer reply message is transmittable to the mobile application via at least one of the transcoding proxies.

22. A communication system for a communication session between an information source and a portable application at a particular location associated with a first transcoding proxy and in a network having a number of particular locations with a transcoding proxy for transcoding communication sessions associated therewith to and from a format suitable for the portable application, the communication system comprising:

instructing means for transferring a relaying of a communication session from the first transcoding proxy to a second transcoding proxy associated with another particular location of the plurality thereof; and

migration initialization means for receiving from the portable application in the particular location a transfer request message, determining one or more additional locations having transcoding proxies associated with one or more of the number of particular locations, the one or more additional locations being near to the particular location associated with the first transcoding proxy, and forwarding the transfer request message to the transcoding proxies from the one or more additional locations, in response to which at least one of transcoding proxies sends a transfer reply message to the portable application.