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Small cell power control method and device

A power control and small cell technology, applied in the field of communication, can solve the problems of handover energy consumption, mutual interference between small cells, and performance impact of neighboring cells, and achieve the effect of reducing interference and avoiding impact.

Inactive Publication Date: 2014-11-26
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Increasing the number of small cells in hotspot areas is an effective mechanism to increase network capacity and reduce coverage holes, but it also brings many problems, such as mutual interference between small cells, handover, and energy consumption.
Usually, in the initial activation stage of a small cell, it will cause sudden interference to the surrounding same-frequency neighbor cells, and the sudden interference will affect the performance of the neighbor cells

Method used

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  • Small cell power control method and device
  • Small cell power control method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Embodiment 1: Power allocation scheme when a small cell is activated

[0081] Activate Cell1, configure the initial maximum downlink transmit power Pinit of Cell1, and Pinit is smaller than the rated maximum transmit power Pmax of Cell1. Cell1 configures the transmit power of the downlink signal based on Pinit.

[0082] The following methods can be used to configure Pinit:

[0083] Configure Pinit to a certain power value, which is less than the rated maximum transmit power of Cell1;

[0084] Alternatively, the path loss PL between UE1 and Cell1 is estimated based on the received strength of the Discovery signal (DS) signal measured and fed back by UE1, and the DS transmit power, and an appropriate Pinit is configured based on the PL and other information. For example Pinit=α*PL+G. Among them, α>=0, α is the weighting coefficient obtained based on the measurement; G is the initial quantity considering factors such as neighbor cell interference;

[0085] Or, if multi...

Embodiment 2

[0093] Embodiment 2: Power allocation scheme when the small cell is deactivated

[0094] The transmit power of the small cell is gradually reduced to reduce the signal coverage, and at the same time, the serving UE is handed over to other small cells, such as neighboring cells. Neighboring cells can simultaneously increase transmit power to increase coverage.

[0095] Specifically, after receiving the deactivation instruction, Cell1 gradually reduces the transmission power to reduce the coverage area. The specific method can be:

[0096] The transmission power is periodically lowered according to the set step size, and the small cell is finally deactivated. For example, if the period is T and the power adjustment step is ΔP, then Pmax(n)=P-n*ΔP. Wherein, Pmax(n) is the downlink maximum power configuration in the nth cycle, Pmax(n)=1;

[0097] The transmission power is periodically lowered according to the set step size, and the small cell can be directly deactivated when P...

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Abstract

Disclosed are a microcell power control method and a base station. The method comprises: when a state change of a microcell is detected, configured for the microcell is a transmission power that is less than a rated value in a conventional activated state.

Description

technical field [0001] The present invention relates to the communication field, in particular to a small cell power control method and device. Background technique [0002] With the widespread popularity of PC services and smart terminals, people have higher and higher requirements for wireless communication experience, especially communication speed. In the long-term evolution (Long Term Evolution, LTE) standard and subsequent standard evolution, in order to improve user perception and system throughput, especially in order to improve the throughput of hotspot areas, a heterogeneous network (Heterogeneous Network, HetNet) networking is adopted Architecture, that is, to deploy small cells (Small cells) within the signal coverage of macro cells (Macro cells) to improve service quality and throughput in hotspot areas. figure 1 It is a typical small cell scenario, in which two small cells, small cell 1 and small cell 2, have the same frequency, and the signal coverage of the ...

Claims

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Application Information

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IPC IPC(8): H04W52/24H04W52/36
CPCH04W52/244H04W52/143H04W52/242H04W52/386H04W52/50H04W72/23H04W24/08H04W52/243H04W72/0473
Inventor 赵亚军徐汉青莫林梅
Owner ZTE CORP