Self-adaptive setting method and device for CRE bias

A cell handover and handover offset technology, applied in the field of wireless communication, can solve the problems of large co-frequency interference of border users and the inability to guarantee the channel quality of border users, and achieve the effect of excellent channel quality

Inactive Publication Date: 2013-10-23
北京电信技术发展产业协会 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the setting of CRE Bias often affects the interference degree of users at the cell border. If the fixed value of CREBias can ensure the maximum expansion of the equivalent c

Method used

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  • Self-adaptive setting method and device for CRE bias

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0033] Example one

[0034] figure 1 This is a flowchart of a method for adaptively setting a cell handover offset provided in the first embodiment of the present invention. In this embodiment, the user sets the cell handover offset for handover from a macro cell to a Pico Cell cell, such as figure 1 As shown, the method includes the following steps:

[0035] Step 101: Count the offset CRE in the initial cell handover 0 Pico Cell resource occupancy status ρ under conditions 0 .

[0036] The resource occupation status involved in this step may include, but is not limited to: the number of resource occupations or the resource occupation rate.

[0037] Step 102: Determine the calculated ρ 0 Is it smaller than the preset resource occupancy threshold ρ th , If yes, go to step 103; otherwise, use CRE 0 As the current cell handover offset, the setting process ends.

[0038] Among them, the resource occupation status threshold ρ th It is usually a threshold set by the operator according to th...

Example Embodiment

[0050] Embodiment two

[0051] figure 2 This is a structural diagram of the device for adaptively setting the cell handover offset provided in the second embodiment of the present invention. The device is used to set the cell handover offset for handover from a macro cell to a low-power cell, such as figure 2 As described, the device includes: a resource occupancy statistics unit 201, a resource occupancy judgment unit 202, a step size adjustment unit 203, a signal-to-interference and noise ratio statistics unit 204, and a signal-to-interference and noise ratio judgment unit 205.

[0052] The resource occupancy statistics unit 201 is used to count the offset CRE in the initial cell handover 0 Under conditions, the resource occupancy status of low-power cells ρ 0 .

[0053] Among them, the resource occupancy status involved may include, but is not limited to: resource occupancy number or resource occupancy rate.

[0054] The resource occupancy judgment unit 202 is used to judge the ...

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Abstract

The invention provides a self-adaptive setting method and device for a CRE bias. The method and device are used for setting the CRE bias in a switch from a macro cell to a cell of low power; S1: carrying out a statistics of a signal to interference and noise ratio (SINR) of boundary users in the cell of low power under the current CRE bias; S2: judging whether the SINR of all the boundary users of the cell of low power is larger than a preset threshold value SINRth, if yes, adopting the current CRE bias and ending the setting process, if no, executing the S3; and S3: subtracting an adjustment step length delta 2 from the current CRE bias value and then an updated current CRE bias is obtained, and then turning to the S1. The self-adaptive setting method and device for the CRE bias ensures expansion of equivalent coverage area of Pico Cells while trying to ensure channel quality for the boundary users to the greatest extent.

Description

【Technical field】 [0001] The present invention relates to the technical field of wireless communication, in particular to a method and device for adaptively setting a cell switching offset. 【Background technique】 [0002] In order to improve the coverage of the mobile network, in addition to the macro cell, the Long Term Evolution (LTE) system also introduces low-power nodes such as pico base stations (Pico eNB) to form a pico cell (Pico Cell) to offload the traffic in the macro cell. business and enhance the coverage of hotspots in a small area, thus forming a heterogeneous network. These Pico Cells are usually very small cells set up between buildings, and have increasingly broad application prospects. [0003] In the above-mentioned application environment where the macro cell is combined with the Pico Cell, although the coverage is extended, it will involve the handover problem of the mobile terminal between the macro cell and the Pico Cell and the problem of co-channel...

Claims

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Application Information

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IPC IPC(8): H04W36/04H04W36/30
CPCY02D30/70
Inventor 金毅敦杨骅陈晓忠
Owner 北京电信技术发展产业协会
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