Method for realizing intercell soft switching in OFDM system

An orthogonal frequency division, cross-cell technology, applied in the field of cross-cell soft handover, can solve the problems of soft handover that does not support inter-frequency, increase network side costs, etc., to reduce signaling overhead, increase costs, and reduce power consumption. Effect

Active Publication Date: 2006-06-21
WANBAO ELECTRONICS NANTONG
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Problems solved by technology

[0010] The disadvantage of the above method is that the cells that need to participate in the handover all use the same frequency point, and do not support soft handover of different frequencies; at the same time, the signals arriving at the mobile station from each cell must be synchronized, which requires good synchronization between the cells. At the same time, the network The side must have a good synchronization plan, which increases the cost of the network side

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  • Method for realizing intercell soft switching in OFDM system
  • Method for realizing intercell soft switching in OFDM system
  • Method for realizing intercell soft switching in OFDM system

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[0044] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0045] The idea of ​​the present invention is: the mobile station measures the signal quality of the current cell and the adjacent cell in real time, and reports the measurement information; , notify the mobile station to enter the cross-cell handover mode; the mobile station establishes a link connection with the current cell and the selected adjacent handover cell at the same time, and simultaneously receives and combines the signals of the current cell and the adjacent handover cell; the mobile station Release the link connection with the cell whose signal quality cannot meet the call requirements, and restore the normal communication mode.

[0046] In order to enable the mobile station to achieve cross-cell soft handover, the OFDM symbols in the cell where the mobile station is currently located and in the adjacent handover cell are respectively classifie...

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Abstract

The invention provides a cross-subarea soft switch method for OFDM system. Wherein, mobile platform detects real-time the signal quality of current subarea and near one and reports detection information; the network side determines the mobile need to switch cross-subarea and the near subarea according to reported information, then notifies the mobile platform to turn into cross-subarea switch mode; the mobile platform builds link connection with both current and near subarea at one time to receive and combine signal; then, releases the link connection to the subarea not satisfied communication request, and recovers normal communication mode. This invention has no request to on frequency to near subarea, and can realize real-time and flow media business.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a method for realizing cross-cell soft handover in an orthogonal frequency division multiplexing system. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) is a mobile communication technology that utilizes parallel transmission to improve communication data transmission rate. In a system using OFDM technology, information streams are mapped to different frequency channels for transmission. In the existing OFDM system, if the mobile station is at the edge of the cell and needs to move from one cell to another, there are usually the following methods to achieve cross-cell handover: [0003] Method 1: The mobile station (UE) does not perform cross-cell handover and measurement during the communication process. When the mobile station loses connection with the current cell, it starts to measure th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/08H04L27/26H04W24/10H04W36/08H04W36/18
Inventor 吴更石
Owner WANBAO ELECTRONICS NANTONG
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