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A base station power control method for multi-cell wireless network of LTE-A system

A technology of LTE-A and wireless network, applied in the field of network communication, can solve problems such as unbalanced load and increase cell energy utilization rate

Active Publication Date: 2016-11-02
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the priority of improving the unbalanced load in the cell is higher than that of improving the QoS guarantee at the cell edge, the priority of improving the QoS at the cell edge is higher than that of increasing the energy utilization rate of the cell

Method used

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  • A base station power control method for multi-cell wireless network of LTE-A system
  • A base station power control method for multi-cell wireless network of LTE-A system
  • A base station power control method for multi-cell wireless network of LTE-A system

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Embodiment 1

[0085] Such as figure 2 A TDD-LTE-A network is constructed as shown. There are 19 cells in total. Each cell uses an omnidirectional antenna. The frequency reuse factor between cells is 1. Except for edge cells, each cell has six adjacent cells. . Base station power is limited to P max = 30w. The period of each power control operation is 100×10 TTIs.

[0086] The following table shows the actual system parameter table of the TDD-LTE-A network:

[0087]

[0088] (1) The system calculates the average load of Cell 1 within 100×10 TTIs:

[0089] load 1 avg = ∑ t = 0 99 × ( 10 × 1 ms ) ...

Embodiment 2

[0100] As shown in Figure (3), construct a structured FDD-LTE-A network, which also includes 19 cells, each cell uses omnidirectional antennas, and the frequency reuse factor between cells is 1. Except for edge cells, each cell has six neighboring quarters. Base station power is limited to P max = 30w. The period of each power control operation is 100×10 TTIs.

[0101]

[0102]

[0103] (1) The system calculates the average load of Cell 1 within 100 TTIs:

[0104] load 1 a v g = Σ t = 0 99 × ( 10 × 1 m s ) ...

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Abstract

The invention discloses a base station power control method of a multi-cell wireless network in an LTE-A system. The eNodeB in the system periodically detects the load in the cell and the CQI information reported by the UE in the cell. When the load condition meets the power control threshold value, That is, virtual power control is started to transfer the load of the overloaded cell to the low-loaded cell; if there is no load imbalance problem in the cell or the load imbalance has been resolved, the proportion of users at the edge of the cell is judged by CQI, and if the proportion is greater than the threshold value, then Start the power control scheme of multi-point coordinated transmission to improve the QoS of the cell edge users; if there is no load imbalance problem in the cell and there is no edge user QoS lower than the threshold value, or the above problems are solved, the actual power adjustment The method improves the energy utilization rate of the cell. The present invention solves the problems of unbalanced load, cell edge QoS and energy utilization rate in a multi-cell scene in one process through actual or virtual power control, and avoids the incomplete problem of separate system control.

Description

technical field [0001] The invention relates to a base station power control method of a multi-cell wireless network in an LTE-A system, which is used to solve problems such as load imbalance, cell edge service quality assurance (QoS) and power utilization in a multi-cell scene, and belongs to the technical field of network communication . Background technique [0002] LTE-A is the latest standardization achievement of the 3GPP organization, which greatly improves the transmission rate of wireless communication. But it will also face many major challenges. Load balancing, improvement of QoS for edge users, and improvement of energy utilization are three important issues that need to be solved urgently. [0003] Generally, when the load is unbalanced, the LTE-A system achieves load transfer by adjusting handover parameters; when there are too many cell edge users, the system uses CoMP technology to improve cell edge user communication; when the load is low, the base station...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/08H04W52/24H04W72/04
CPCH04W52/343H04W52/24
Inventor 赵新胜张巍
Owner SOUTHEAST UNIV
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