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Inter-cell interference coordination method and system

A technology of inter-cell interference and source cell, applied in the field of communication, can solve the problems of high interference in adjacent cells and failure of ICIC function, and achieve the effect of reducing interference, reducing frequent interaction, and reducing transmission frequency

Active Publication Date: 2012-12-19
盐城大数据资产经营管理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] When two cells exchange load coordination information through the semi-X2 interface, X2 interface or S1 interface in the eNodeB (Evolved NodeB), if the load information is turned off due to the shutdown of the ICIC function at the sending end or the S1 and X2 interfaces are abnormal, The receiving cell cannot correctly use the received load information, and still uses the previously received, possibly outdated load information to schedule and power control the edge users of this cell. As a result of this operation, the ICIC function itself may not be able to achieve the effect. It is also possible that the use of outdated information will cause greater interference between neighboring cells

Method used

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  • Inter-cell interference coordination method and system

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no. 1 example approach

[0053] There is an X2 interface between two eNodeBs, and the X2 interface can be used to transmit load information, such as figure 2 As shown, it is a flow chart of the method of the first embodiment of the present invention, including,

[0054] Step S201, the two eNodeBs enable the ICIC function, and prepare to transmit load information through the X2 interface, so as to realize inter-cell interference coordination;

[0055] Step S202, eNodeB1 determines the sending cycle of load information, initiates a negotiation process to eNodeB2, and eNodeB2 replies to eNodeB1 after receiving the periodic negotiation request; or eNodeB2 determines the sending cycle of load information, initiates a negotiation process to eNodeB1, and eNodeB1 receives it, Reply a response to eNodeB2;

[0056] Step S203, start sending load information between the two eNodeBs, and eNodeB1 regularly updates the load information to eNodeB2 according to the negotiation period determined by it; at the same ti...

no. 2 example approach

[0061] There is no X2 interface between two eNodeBs, and the load information can be sent through the S1 interface, such as image 3 Shown is the flow chart of the method of the second embodiment of the present invention, specifically,

[0062] Step S301, the two eNodeBs enable the ICIC function, and prepare to transmit load information through the S1 interface, so as to realize inter-cell interference coordination;

[0063] Step S302, eNodeB1 determines the sending cycle of load information, notifies MME (Mobility Management Entity, mobile management entity), MME initiates a negotiation process to eNodeB2, and eNodeB2 returns a cycle negotiation response to MME after receiving the MME periodic negotiation request, and MME sends eNodeB2's The response is forwarded to eNodeB1; or eNodeB2 uses the same method to determine the negotiation cycle between MME and eNodeB1, and obtains the response of eNodeB1 through MME;

[0064] Step S303, the two base stations start to send load i...

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Abstract

The invention provides an inter-cell interference coordination method which comprises the following steps that: an ICIC (inter-cell interference coordination) function is started, and a source cell or a target cell determines a load information consultation period; the source cell sends load information to the target cell during the consultation period; and after receiving the load information, the target cell carries out inter-cell interference coordination according to the load information. The invention also relates to an inter-cell interference coordination system. By using the technical scheme of the invention, the interference between adjacent cells is coordinated through carrying out real-time updating on load information, so that the interference between the adjacent cells is effectively reduced, and furthermore, the load information sending frequency is reduced, and the frequent interaction between interface information is reduced.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and system for inter-cell interference coordination. Background technique [0002] LTE (Long Term Evolution, long-term evolution) adopts OFDMA (Orthogonal Frequency Division Multiple Access, Orthogonal Frequency Division Multiple Access) technology. OFDMA technology uses the orthogonality between frequencies as a way to distinguish users, and carries user information On different carriers that are orthogonal to each other, it can effectively resist frequency selective fading. In addition, since the frequencies used by users in the cell are orthogonal to each other, all interference comes from other cells, which can also greatly improve the SINR (Signal to Noise Ratio) of users in the center of the cell, thus providing higher data rates and better quality of service. As for the users at the cell edge, since the users occupying the same carrier resource in the adjacent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/08H04W28/16
CPCH04W92/20H04W72/1231H04W72/542
Inventor 王妮司伟
Owner 盐城大数据资产经营管理有限公司
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