Method for performing a handoff in an ALL-IP network

• US 20030153314A1
• Filed: 12/30/2002
• Published: 08/14/2003
• Est. Priority Date: 12/29/2001
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Jong-Oh, Choi, Jae-Am
• Granted Patent: US 7,545,775 B2
• Time in Patent Office: Days
• US Class Current: 455/436
• CPC Class Codes: H04L 69/04 Protocols for data compression, e.g. ROHC
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 36/0033 with transfer of context information
• CPC Class Codes: H04W 80/00 Wireless network protocols or protocol adaptations to wireless operation

Abstract

A method for performing a handoff in an ALL-IP network including at least one MS (Mobile Station) for transmitting a signaling frame having a header and a voice frame to an old BTS (Base Transceiver System), which includes a header information storage for storing overhead information for the MS in association with a unique code of the MS, and an RNC (Radio Network Controller). The MS transmits measurement information to a new BTS and the RNC to start a handoff. Upon receipt of the measurement information, the RNC requests the new BTS to set up a radio link with the MS that has transmitted the measurement information. When the radio link is set up between the MS and the new BTS, the RNC deletes header information for the MS, stored in the header information storage of the old BTS. The MS transmits a message including traffic overhead information to the new BTS. Upon receipt of the message including the traffic header information, the new BTS transmits a binding update message to the MS.

Claims

1. A method for performing a handoff in an ALL-IP network including at least one MS (Mobile Station) for transmitting a signaling frame including a header and a voice frame to an old BTS (Base Transceiver System), which includes a header information storage for storing overhead information for the MS in association with a unique code of the MS, and an RNC (Radio Network Controller), the method comprising the steps of:

transmitting measurement information to a new BTS and the RNC by the MS to start a handoff;

upon receipt of the measurement information, the RNC requesting the new BTS to set up a radio link with the MS that has transmitted the measurement information;

deleting header information for the MS, stored in the header information storage of the old BTS, by the RNC upon setup of the radio link between the MS and the new BTS;

transmitting a message including traffic overhead information from the MS to the new BTS; and

upon receipt of the message including the traffic header information, transmitting a binding update message from the new BTS to the MS.

2. The method of claim 1, further comprising the MS transmitting and receiving a voice frame including a traffic overhead when the binding update message is not received