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Soft switching method and terminal device

A technology of terminal equipment and soft handover, applied in the field of network communication, can solve the problem that uplink information cannot be demodulated, demodulated, and unable to establish HSUPA link in the target cell, and achieve the effect of improving the success rate of soft handover

Active Publication Date: 2007-07-25
HUAWEI TECH CO LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

In this way, the uplink information transmitted by the terminal using the HARQ method of the original cell cannot be demodulated in the target cell
[0012] Due to the different capabilities of the two base stations, the uplink information transmitted by the terminal using the HARQ method of the original cell cannot be demodulated in the target cell. In this way, when the terminal only supports HSUPA services and performs soft handover between the two cells, it cannot be established in the target cell. True HSUPA link, unable to perform soft handover successfully

Method used

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  • Soft switching method and terminal device

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Embodiment Construction

[0053] The present invention provides multiple soft handover methods, which can be applied to different application scenarios, effectively avoid the soft handover failure phenomenon in the prior art, and improve the success rate of soft handover.

[0054] In the following, the methods for implementing soft handover in various different modes provided by the present invention will be separately described.

[0055] Method 1: Adjust the HARQ mode of the target cell base station and the HARQ mode of the original cell base station to the same HARQ mode.

[0056] First, before performing soft handover, the terminal determines that the HARQ mode of the target cell base station is different from the HARQ mode of the current cell base station. For example, the HARQ mode of the target cell base station is chase only, and the HARQ mode of the current cell base station is IR only. Here, the terminal can determine whether the HARQ mode of the target cell base station is different from the HARQ...

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Abstract

In the invention, when terminal makes software switch, the terminal decides if the destination cell base station and the original cell base station use identical HARQ mode, and according to the physical circumstance of original cell base station and destination cell base station, uses different mode to realize the software switch process. The invention can be used in the both situations; one is the terminal can learn that the HARQ modes are different in the original cell base station and in the destination cell base station, and is capable of adjusting said HARQ modes to be consistent; another one is the terminal can't learn the HARQ modes of original cell base station and destination cell base station.

Description

Technical field [0001] The invention relates to the technical field of network communication, in particular to a soft handover method and terminal equipment. Background technique [0002] UMTS (Universal Mobile Telecommunications System) is a third-generation mobile communication system using WCDMA (Wideband Code Division Multiple Access) air interface technology. UMTS is mainly developed in the WCDMA / GSM global standardization organization 3GPP. [0003] With the development of the third-generation mobile communication technology, people’s demand for mobile communication is no longer satisfied with voice services. Since the third-generation mobile communication system can provide services with higher data rates than the second-generation mobile communication system, so, A large number of multimedia services have emerged, such as video telephony, picture upload, and high-speed Internet browsing services. In order to enhance the uplink capacity and improve the user uplink performa...

Claims

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Application Information

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IPC IPC(8): H04Q7/38H04Q7/32H04L1/18H04W36/18
CPCH04W36/18
Inventor 尹丽燕
Owner HUAWEI TECH CO LTD
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