Process method of GSM cell switching and system thereof

A cell handover and processing method technology, applied in the direction of electrical components, wireless communication, etc., can solve the problem that the signal level cannot be effectively offset and affect the handover effect of the mobile station, and achieve the effect of avoiding false handover

Inactive Publication Date: 2010-03-17
ZTE CORP
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Problems solved by technology

However, since the signal of cell C at point K is very strong, the level change value of cell C measured by the MS at point K is as follows: figure 2 shown; this can easily trigger a switch from A to C, which we do not want to happen
[0010] In order to prevent handover from A to C at point K, the effective method includes modifying the handover threshold of neighboring cell C, but this will inevitably seriously affect the handover effect when the mobile station moves along the main road from A to C
Another method is to modify the size of the sliding window N for calculating the average level value of the cell C; by setting N to be larger, some short-term high signal levels will be offset by the long-term sliding average, thereby avoiding the The cell is judged as a candidate handover cell; however, the algorithm has the disadvantage that the strong signal level for some bursts cannot be effectively canceled out

Method used

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  • Process method of GSM cell switching and system thereof
  • Process method of GSM cell switching and system thereof
  • Process method of GSM cell switching and system thereof

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specific Embodiment approach

[0040] The processing method of GSM cell handover of the present invention, its a kind of embodiment comprises:

[0041] Whether to use the cell as a candidate handover target cell is determined according to whether the time duration during which the reception level of the adjacent cell is higher than a predetermined value exceeds a set threshold T, and if it exceeds, it is used as a candidate handover target cell.

[0042] The predetermined value of the reception level is a preset threshold of the reception level.

[0043] The judging process specifically judges within the set threshold T whether the receiving level of K consecutive reports is higher than a predetermined value, where T=K×measurement report period, and if so, the duration exceeds the set threshold T.

[0044] The reception level in this report is the value processed by the moving average method. That is, it is calculated by the following formula:

[0045] AvRx ( n ...

Embodiment approach

[0047] Another embodiment of the processing method of the present invention, its flow process is as follows image 3 shown, including the following steps:

[0048] Step 301: MS reports measurement report; MS reports measurement report to BSS, the time interval for reporting and the number of adjacent cells can be set according to needs, in this embodiment, the downlink level value and received signal of the serving cell are reported every 480ms The quality value and the downlink received signal level values ​​of the six strongest adjacent cells.

[0049]Step 302: BSS preprocessing; BSS according to the measurement report and the selection of different handover algorithms (sets), the uplink / downlink level value of the serving cell, the received signal quality value and the downlink received level signal of the adjacent cell in the measurement report Quality is preprocessed. For example, when a handover algorithm based on downlink level is selected, it is first necessary to pe...

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Abstract

The invention discloses a process method of GSM cell switching, comprising the steps of: judging whether the cell is taken as a candidate switching object cell according to that whether the duration time that the receiving level of the adjoining cells is higher than a preset value is over a set threshold value T; and if the duration time is over the threshold value T, the cell is taken as the candidate switching object cell. The invention also discloses a process system of GSM cell switching. By judging whether the duration time that the receiving level of the adjoining cells is higher than the preset value is over the set threshold value T when switching, the invention can prevent from taking the cell which generates short strong signals caused by signal leakage and drift under some special scenes to be as the candidate switching object cell, thus preventing from error switching caused thereby.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a processing method and system for cell switching in GSM. Background technique [0002] The so-called handover in mobile communication means that when the mobile station moves from one base station coverage area to another base station coverage area during a call, or when the call quality deteriorates due to external interference, it must change the original voice channel and switch to another one. A new free voice channel goes up to continue the process of holding the call. There are many handover algorithms, including level-based handover, quality-based handover, distance-based handover, speed-based handover, path loss-based handover, macro-micro handover, and so on. [0003] One of the triggering conditions for handover is that the BSS (Base-Station Sub-System: Base Station Sub-System) receives a measurement report from the mobile station MS (Mobile Station: Mobile Station...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/08
Inventor 包建飞
Owner ZTE CORP
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