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

A technology of LTE-A and power control, applied in the field of network communication, which can solve the problems of unbalanced load and increase of cell energy utilization rate, etc.

Active Publication Date: 2014-02-05
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 e

Method used

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

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] 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.

[0088] The following table shows the actual system parameter table of TDD-LTE-A network:

[0089]

[0090]

[0091] (1) The system calculates the average load of Cell 1 within 100×10 TTIs:

[0092] load 1 avg = Σ t = 0 99 × ( 10 × 1 ms ) ...

Embodiment 2

[0103] Such as figure 1 An FDD-LTE-A network is constructed as shown, 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 adjacent cells . Base station power is limited to P max = 30w. The period of each power control operation is 100×10 TTIs.

[0104]

[0105] (1) The system calculates the average load of Cell 1 within 100 TTIs:

[0106] load 1 avg = Σ t = 0 99 × ( 10 × 1 ms ) load 1 cur ...

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Abstract

The invention discloses a base station power control method of an LTE-A system multi-cell wireless network. An eNode B in a system periodically detects a load in a cell and CQI information reported by UE in the cell, when a load condition satisfies a power control threshold value, virtual power control is started such that the load of an overload cell is transferred to a low load cell. If the cell has no load imbalance problem or the load imbalance is solved, the cell edge user proportion is judged through the CQI. If the proportion is larger than the threshold value, the power control scheme of multi-point cooperative transmission is started, and the QoS of a cell edge user is improved. If the cell has no load imbalance problem and the QoS of the cell edge user is not lower than the threshold value, or the above problem is solved, the cell energy utilization rate is raised through the method of actual power adjustment. According to the method, through the real or virtual power control, the problems of load imbalance under a multi-cell scene, cell edge QoS and an energy utilization rate are solved in one process, and a problem of incompleteness of separate control system is avoided.

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] In general, when the load is unbalanced, the LTE-A system achieves load transfer by adjusting handover parameters; when there are too many users at the edge of the cell, the system uses CoMP technology to improve the communication of users at the edge of the cell; w...

Claims

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Application Information

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IPC IPC(8): H04W28/08H04W52/24H04W72/04
CPCH04W52/343H04W52/24
Inventor 赵新胜张巍
Owner SOUTHEAST UNIV
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