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Handovers of user equipment connections in wireless communication systems

A technology for connecting and connecting chips, which is applied in wireless communication, transmission system, radio/inductive link selection arrangement, etc., and can solve problems such as distribution

Inactive Publication Date: 2005-08-31
NOKIA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, these preferred embodiments solve the problems associated with unnecessary allocation of carrier frequencies that do not change during handover

Method used

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  • Handovers of user equipment connections in wireless communication systems
  • Handovers of user equipment connections in wireless communication systems
  • Handovers of user equipment connections in wireless communication systems

Examples

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Embodiment Construction

[0021] Before beginning the detailed description of the preferred embodiment of the invention, the following description is useful. Preferred embodiments of the present invention are described with reference to an exemplary wireless communication system in accordance with Release 4 of the Specifications developed by the Third Generation Partnership Project. However, these preferred embodiments are not limited to implementation in 3GPP wireless communication systems. They may be implemented in any wireless communication system including, but not limited to, FDMA, CDMA or TDMA type systems. Configurations and embodiments of an exemplary 3GPP wireless communication system are represented in block diagram form and described in this application without excessive detail so as not to obscure the invention, and also in view of the fact that specific details about the implementation of such a system The details can be largely related to the environment. In other words, these specific...

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Abstract

An inter-frequency handover of a UE connection is performed in which the frequency of the uplink connection from the UE to a base station remains the same and the frequency of the downlink connection from the base station to UE changes from a first downlink frequency to a second downlink frequency (figure 4). A request for the handover is transmitted from the base station (401). The request containing information indicating the second downlink frequency and information indicating that the uplink frequency remains the same. In response to the request, the physical layer of the uplink connection is maintained while changing the downlink frequency from the first downlink frequency to the second downlink frequency (403).

Description

technical field [0001] Generally, the present invention relates to wireless communications. More specifically, the present invention relates to handover of User Equipment (UE) under the control of a Radio Network Controller (RNC) in a wireless communication system. Background technique [0002] In wireless communication systems, soft handover is used to gradually transfer a user equipment (UE) connection from one base station to another without requiring the user to experience any interruption in communication. For example, hard handover is used for switching between modes of operation or switching between base stations when soft handover cannot be performed. Specifically, inter-frequency hard handover is used to switch the connection between the UE and the radio access network from one frequency carrier or frequency band to another. Although it may not necessarily be obvious to the user, a hard handover usually involves some kind of interruption of the connection between ...

Claims

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Application Information

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IPC IPC(8): H04B7/005H04B17/00H04W36/18H04W36/20H04W36/38H04W52/40
CPCH04B17/354H04W36/38H04B17/0077H04B17/0042H04W36/18H04W52/40H04B17/309H04B17/318H04W36/20H04B17/327H04B17/0052H04B17/382H04B17/24H04B17/0057H04B17/0067H04B17/0045
Inventor U·施瓦兹P·穆申斯基K·里基宁
Owner NOKIA CORP
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