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Hard handoff method and system for cell to establish forward supplemental channel

A forward supplementary channel, hard handover technology, applied in the field of cell selection technology, can solve the problems of high frame error rate, affecting data download, poor link quality, etc., to achieve the effect of reasonable and effective use of wireless resources and saving

Active Publication Date: 2011-09-21
ZTE CORP
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Problems solved by technology

[0005] However, when the mobile terminal is located in the handover area where multiple pilots are located or the area where the wireless signal is unstable, since the hard handover method only establishes the FSCH on one cell, the base station system may continue to reselect a more suitable cell to establish the FSCH. Demolition and construction of FSCH is prone to ping-pong effect
However, if the FSCH switching is not performed in time, it may be interfered by other pilot signals, resulting in link quality error and high frame rate, which affects data downloading

Method used

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  • Hard handoff method and system for cell to establish forward supplemental channel
  • Hard handoff method and system for cell to establish forward supplemental channel
  • Hard handoff method and system for cell to establish forward supplemental channel

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Embodiment Construction

[0039] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and through specific embodiments.

[0040] The present invention mainly uses the following control principle to determine the cell where the FSCH should be established according to the cell pilot strength reported by the mobile terminal and the related threshold for establishing the FSCH set by the base station system.

[0041] Attached below figure 1 The embodiment in the pair of method that the present invention proposes is described in detail. It is first necessary to set hard handover threshold parameters in the system, and construct hard handover judgment conditions based on these threshold parameters. figure 1 Including the following steps:

[0042]In step 101, a data service call connection is established between the mobile terminal and the base station, and data transmission is performed through the basic service channel.

[0043] Step 1...

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Abstract

The invention discloses a hard handoff method and a hard handoff system for a cell to establish a forward supplemental channel; and by the setting of a hard handoff threshold parameter and the construction of a hard handoff judging condition, the method completes the process of processing the hard handoff according to information of a pilot frequency measuring report of a mobile terminal receivedby a base station system. The method and the system can optimally use the wireless resource of the base station system, can switch FSCH to the most appropriate cell in the most appropriate time according to actual condition of the wireless environment, realize the establishment of the high-speed and stable FSCH and can also avoid the ping-pong effect generated in the hard handoff process.

Description

technical field [0001] The invention relates to the data service in the CDMA2000 system, more specifically, it is a cell selection technology for the CDMA2000 base station system to establish a forward supplementary channel. Background technique [0002] The CDMA2000 system not only provides traditional voice services, but also data services. With the continuous increase of data service users, low-speed data services can no longer meet user needs, so the CDMA2000 system needs to be able to provide high-speed data services. Among them, the high-speed data download service is realized by establishing FSCH (Forward Supplemental Channel, ie forward supplemental channel) of different rates between the mobile terminal and the base station system. FSCH is a physical service channel that allows the base station system to transmit high-speed data to mobile devices by allocating a large number of wireless resources to each user, including WalshCode (Walsh Code), CE (Channel Element, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/14H04W36/18H04W48/18
CPCH04W36/385
Inventor 马甄韩桂鲁卢晓
Owner ZTE CORP
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