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Inter-cell power control method for cellular mobile communication system

A technology of cellular mobile communication and power control, applied in transmission control/equilibrium, sustainable building, climate sustainability, etc., can solve problems such as cell edge interference and spectrum efficiency reduction, and achieve the effect of balanced interference

Inactive Publication Date: 2012-11-14
ZTE CORP
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using a relatively high multiplexing factor, such as setting the multiplexing factor to 1 means that adjacent cells use the same frequency resources, which will cause serious interference at the edge of the cell
Using a lower multiplexing factor, such as taking a multiplexing factor of 3 or 7, can effectively suppress inter-carrier interference, but the spectral efficiency will be reduced to 1 / 3 or 1 / 7

Method used

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  • Inter-cell power control method for cellular mobile communication system
  • Inter-cell power control method for cellular mobile communication system
  • Inter-cell power control method for cellular mobile communication system

Examples

Experimental program
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Embodiment Construction

[0023] Take Frequency Division Duplex (FDD system for short) of 3GPP LTE as an example. In each inter-cell power control period, for example, 20ms, each base station monitors the interference situation of the uplink data channel of its control sector, and if the interference IoT value exceeds or equals a threshold, for example, 5dB, the base station will report to the adjacent base station through the X2 interface A logic overload indication "+1" is sent; on the contrary, if the interference IoT value is lower than the threshold, the base station sends a logic overload indication "-1" to a neighboring base station.

[0024] In each inter-cell power control period, a certain sector measures the overload indication values ​​transmitted from adjacent N sectors, and then judges whether the base station broadcasts and informs UEs in this sector to perform inter-cell power control and The overload indication values ​​of the N sectors are broadcast. One of, but not limited to, the c...

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Abstract

The invention relates to an inter cell power control method of a honeycomb mobile communication system including: using overload indicated values from each adjacent sector to judge whether to process the inter cell power control to the UE of the sector; determining the path loss difference value between the UE computing service base station and the adjacent base station of the strongest path as well as each power control step; judging whether to increase or decrease the UE transmitting power by comparing an inter cell power control accumulation saved and updated by the UE with a default threshold value, and the adjustment range of the transmitting power is the product of the accumulation and the power control step. The method using different power control step sizes to the cell edge usersand the center users balances the interference of each cell better, and greatly develops the spectrum efficiency and the throughput capacity of the cell edge users while at the same time well meets the overall system throughput capacity.

Description

technical field [0001] The invention relates to a mobile communication system, in particular to a power control method between cells of a cellular mobile communication system. Background technique [0002] Inter-cell interference is an inherent problem in cellular mobile communication systems. The traditional solution is to use frequency multiplexing, and there are only a few specific options for the multiplexing factor, such as 1, 3, 7, and so on. Using a relatively high multiplexing factor, such as setting the multiplexing factor to 1 means that adjacent cells use the same frequency resources, will cause serious interference at the edge of the cell. And adopting a lower multiplexing factor, such as taking a multiplexing factor of 3 or 7, can effectively suppress inter-carrier interference, but the spectral efficiency will be reduced to 1 / 3 or 1 / 7. With the continuous evolution of the cellular mobile communication system, the system requires higher and higher spectral eff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/005
CPCY02B60/50
Inventor 张禹强郝鹏郁光辉戴博
Owner ZTE CORP
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