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Method for switching boundary in multi-transmission type code division multiple access system

A code division multiple access, multi-transmission technology, applied in the field of border switching, to improve network quality and user experience, and reduce the system call drop rate.

Inactive Publication Date: 2008-07-30
ZTE CORP
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  • Abstract
  • Description
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Problems solved by technology

There may also be other multi-transmission types CDMA systems in the application have the same problem

Method used

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  • Method for switching boundary in multi-transmission type code division multiple access system
  • Method for switching boundary in multi-transmission type code division multiple access system

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Embodiment Construction

[0032] The present invention selects a suitable switching mode by judging the transmission type of the cells participating in the switching, thereby solving the problem of easy call drop when the mobile station switches between cells of different transmission types.

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0034] As shown in FIG. 2 , it is a schematic diagram of a scenario where a mobile station 200 moves in a mixed network network and performs border handover. Wherein, cell A is a cell covered by a satellite transmission base station, and cell B is a cell covered by an optical fiber transmission base station. The mobile station 200 is initially located in the cell A, and during the communication process, the mobile st...

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Abstract

The invention discloses a method of the boundary switch in multi-transport-type Code Division Multiple Access (CDMA) system, which comprises the following steps: when a mobile station detects that a pilot strength from the cell neighboring the mobile station cell is up to the soft handoff threshold, the mobile station reports a Pilot Strength Measurement Message containing the information of the neighboring cell to the base station. The base station obtains the attribute information of the mobile station cell and the neighboring cell from the mobile station. If both cells are of the same transport type, the mobile station is informed of an execution of the soft handoff. If not, the mobile station is informed of an execution of the hard handoff. The invention solves the problem of the failure of the soft handoff due to the different transport delay and achieves a high-quality switch of the mobile station in a mixed network consisting of cells of different transport type through the judgment of the cell transport attribute of the base station controller and the flexible adoption of the soft handoff process and the hard handoff process, which reduces the disconnection rate and improves the network quality and the user experience.

Description

technical field [0001] The invention relates to cellular code division multiple access technology, in particular to a method for boundary switching in a multi-transmission type code division multiple access system. Background technique [0002] Soft handover is one of the key technologies of a cellular Code Division Multiple Access (CDMA, Code Division Multiple Access) system. The so-called soft handover means that when the mobile station needs to communicate with a new base station, it does not interrupt the connection with the original base station first. Soft handover can only be carried out between CDMA channels of the same frequency. It plays a role of diversity of traffic channels at the junction of two base station coverage areas, which can greatly reduce call drops caused by handover and improve system capacity. Hard handover means that the mobile station first interrupts the connection with the original base station, and then gets in touch with the new base station...

Claims

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Application Information

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IPC IPC(8): H04Q7/38H04Q7/30
Inventor 魏元庆
Owner ZTE CORP
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