Inter-cell interference coordination method and base station

A technology of inter-cell interference and coordination method, applied in the field of communication, can solve problems such as low utilization rate of system resources and excessive proportion of users at the cell edge, and achieve the effect of improving system capacity and system resource utilization rate

Active Publication Date: 2012-12-05
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a method for coordinating inter-cell interference and a base station to at least solve the problem of low utilization of system resources caused by the excessive proportion of users at the edge of the cell

Method used

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  • Inter-cell interference coordination method and base station
  • Inter-cell interference coordination method and base station
  • Inter-cell interference coordination method and base station

Examples

Experimental program
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Embodiment 1

[0029] figure 1 is a flow chart of the method for inter-cell interference coordination according to Embodiment 1 of the present invention, such as figure 1 shown, including the following steps:

[0030] Step S102, the base station determines user attributes of cell users according to the measurement information reported by the UE or detected by the base station side, wherein the user attributes include: outer ring users, middle ring users and inner ring users.

[0031] Step S104, the base station adjusts the transmit power of the user according to the user attribute.

[0032] Step S106, the base station determines the scheduling time and the number of time domain resources of the user according to the user attribute and the adjacent relationship between the cells.

[0033] In this embodiment, the base station improves the original classification of users according to the acquired measurement information, and divides the cell users into outer ring users, middle ring users and...

Embodiment 2

[0038] figure 2 is a flowchart of the method for inter-cell interference coordination according to Embodiment 2 of the present invention, as shown in figure 2 shown, including the following steps:

[0039] Step S202, the base station calculates the difference ΔRSRP between the RSRPs of all UE's own cell and the strongest neighboring cell according to the RSRP measurement information reported by the UE, and then sorts the ΔRSRPs of all UEs from small to large, and sets T1 to 30% CDFΔRSRP , T2 is 60% CDFΔRSRP. At the same time, set D1=3dB and D2=3dB.

[0040] Step S204, the base station judges and distinguishes user attributes according to preset user attribute judgment thresholds T1 and T2 and measurement information reported by the user, such as RSRP. If a user's measurement result ΔRSRP = T2, the user is judged as an inner ring user; if a user's measurement result T1 image 3 is a schematic diagram of user attribute discrimination according to the second embodiment, such...

Embodiment 3

[0044] Figure 5 is a flow chart of the method for inter-cell interference coordination according to Embodiment 3 of the present invention, such as Figure 5 shown, including the following steps:

[0045] Step S502, the base station sorts the CQIs of all UEs from small to large according to the CQI measurement information reported by the UE, and sets T1 to 30% CDF CQI, and T2 to 60% CDF CQI. At the same time, set D1=3dB and D2=3dB. The method in this example can also be adapted to the case where the measurement information is RSRQ or reference signal new interference-to-noise ratio.

[0046] Step S504, the base station judges and distinguishes user attributes according to preset user attribute judgment thresholds T1 and T2 and measurement information reported by the user, such as CQI. If a user's measurement result CQI = T2, the user is judged as an inner-loop user; if a user's measurement result T1 image 3 .

[0047] Step S506, the base station adjusts the user power con...

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Abstract

The invention provides an inter-cell interference coordination method and a base station. The inter-cell interference coordination method includes steps of determining user attribute of cell users according to measurement information reported by UE(user equipment) or detected by a base-station side, regulating transmission power of users according to the user attribute, and determining a scheduling time and a time domain resource number by the base station, wherein the user attribute includes an outer loop user, a middle loop user and an inner loop user. The original classification of the users is improved by the base station according to the acquired measurement information, so that defects of resource scarcity or waste caused by overhigh proportion of edge users are overcome, utilization rate of system resources is increased, while system capacity is improved.

Description

technical field [0001] The present invention relates to the field of communications, and in particular, to an inter-cell interference coordination method and a base station. Background technique [0002] In an LTE (Long Term Evolution, Long Term Evolution) system based on OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing), the main interference affecting system performance comes from inter-cell interference, especially for cell edge users. Inter-Cell Interference Coordination (Inter-Cell Interference Coordination, ICIC for short) technology is an important means for reducing interference and improving system performance. Inter-cell interference coordination Through inter-cell coordination, the available resources of each cell are limited to a certain extent, so as to improve the Signal-to-Interference and Noise Ratio (SINR) of adjacent cells on these resources, cell edge User's data rate and coverage. Resources include time and fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/10H04W52/24H04W72/08H04W72/12
CPCH04W52/283H04W72/08H04W72/085H04W72/54
Inventor 张芳阮玉峰文敏
Owner ZTE CORP
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