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Method for performing a handoff in a mobile communication system

A mobile communication system and handover technology, applied in the field of handover, can solve the problems of continuous call congestion, call interruption, etc.

Inactive Publication Date: 2005-04-06
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, continuous call congestion may occur so that the call between MT and BSC is interrupted

Method used

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  • Method for performing a handoff in a mobile communication system
  • Method for performing a handoff in a mobile communication system
  • Method for performing a handoff in a mobile communication system

Examples

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Embodiment Construction

[0053] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

[0054] The present invention provides a method for reducing handover processing time in a mobile communication system by sending data traffic to handover candidate BTSs in advance when handover is expected to occur.

[0055] The network configuration, the structure of the BSC, and the structure of the BTS of the mobile communication system to which the present invention is applied are the same as those described with reference to FIGS. 1 to 3 . The present invention will provide handoff procedures performed by the BSC and BTS. Furthermore, definitions of new messages proposed by the present invention will be given.

[0056] As is well known, cellular mobile communication systems manage a list of BTSs ...

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Abstract

A base station controller (BSC) performs a handoff of a mobile terminal (MT) moving between cells of base transceiver stations (BTSs) in a mobile communication system. If a target BTS is selected as a handoff candidate for the MT as the MT moves from a cell of a source BTS in service toward a cell of the target BTS, the BSC transmits to the target BTS a first message for requesting the target BTS to buffer packets, and transmits packets to be transmitted to the MT to both the source BTS and the target BTS. If the target BTS is determined as a serving BTS for the MT, the BSC transmits to the target BTS a second message including a last sequence number in order to request the target BTS to transmit, to the MT, packets with sequence numbers following the last sequence number of a last packet transmitted from the source BTS to the MT, among the buffered packets.

Description

technical field [0001] The present invention generally relates to a handover method in a mobile communication system, in particular to a method for reducing handover time. Background technique [0002] Fig. 1 shows a network configuration of a conventional mobile communication system. This network configuration is commonly used in IS (Interim Standard)-95A / B, GSM (Global System for Mobile Communications), IS-2000, WCDMA (Wideband Code Division Multiple Access) and UMTS (Universal Mobile Telecommunications Service) systems, although in each Part names may vary across systems. [0003] Referring to FIG. 1, a mobile terminal (MT) 101 represents a mobile communication terminal. The mobile terminal 101 can be used as a voice-based conventional terminal or as an IP (Internet Protocol)-enabled terminal. A Base Transceiver Station (BTS) 102 manages radio resources and actually exchanges data packets and control information over radio links with mobile terminals 101 located within...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04W36/02H04W36/08H04W36/36H04W92/00H04W92/12H04W92/20
CPCH04W36/02H04W92/20H04W92/12H04W36/08
Inventor 李圣元金暎基朴东洙李东俊金相洙赵真晟
Owner SAMSUNG ELECTRONICS CO LTD