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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 coverage of Pico Cell and better unload the load of macro cell, it will be Border users bring large co-channel interference, which cannot guarantee the channel quality of border users

Method used

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  • Self-adaptive setting method and device for CRE bias

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Experimental program
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Embodiment 1

[0034] figure 1 It is a flow chart of an adaptive setting method for cell handover bias provided by Embodiment 1 of the present invention. In this embodiment, a user sets a cell handover bias 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 CRE biased in the initial cell handover 0 The resource occupation status of Pico Cell under the condition ρ 0 .

[0036] The resource occupancy status involved in this step may include but not limited to: resource occupancy number or resource occupancy rate.

[0037] Step 102: Judging the statistically obtained ρ 0 Whether it is less than the preset resource occupancy status threshold ρ th , if yes, go to step 103; otherwise, use CRE 0 As the current cell switching offset, the setting process ends.

[0038] Among them, the resource occupancy status threshold ρ th Usually, it is a threshold set by the operator according to the network condition, an...

Embodiment 2

[0051] figure 2 A structural diagram of an apparatus for adaptively setting a cell handover bias provided in Embodiment 2 of the present invention, the apparatus is used to set a cell handover bias from a macro cell to a low power cell, such as figure 2 As mentioned above, the device includes: a resource occupation statistics unit 201 , a resource occupation judgment unit 202 , a step size adjustment unit 203 , a SINR statistics unit 204 and a SINR judgment unit 205 .

[0052] Resource occupancy statistics unit 201, used for statistics of CRE in the initial cell handover offset 0 Under the condition, the resource occupation status of the low-power cell ρ 0 .

[0053] Wherein, the related resource occupancy status may include but not limited to: resource occupancy number or resource occupancy rate.

[0054] A resource occupancy judging unit 202, configured to judge the statistically obtained ρ 0 Whether it is less than the preset resource occupancy status threshold ρ th ...

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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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