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Method and device for sending interference coordination indication information between cells

A technology for indicating information and interference coordination, which is applied in the field of communication, and can solve problems such as the inability to realize the transmission of ICIC indicating information

Inactive Publication Date: 2015-08-12
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention is proposed in view of the problem that the home base station in the related art cannot realize the transmission of ICIC indication information because there is no X2 interface. Therefore, the main purpose of the present invention is to provide a scheme for sending ICIC indication information to solve the above problems

Method used

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  • Method and device for sending interference coordination indication information between cells
  • Method and device for sending interference coordination indication information between cells
  • Method and device for sending interference coordination indication information between cells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] When the number of PRBs scheduled by a CSG cell to edge UEs reaches a certain threshold, it needs to notify neighboring cells of the strong interference with PRBs, and neighbor cells should try to avoid these PRBs when scheduling their edge UEs. Assume that the threshold configured in the background is 60%. Assume that the system broadcast message 13 is used to notify neighboring cells of the strong PRB interference of the cell. The system broadcast message 13 includes the cell ID and the interference information (for example, HII related information) of each PRB of the cell.

[0052] image 3 It is a flow chart of directly sending ICIC indication information to adjacent cells through a system broadcast message according to Embodiment 1 of the present invention, as shown in image 3 As shown, the process specifically includes the following steps 301 to 303:

[0053] Step 301: When UE1 and UE2 in CSG cell 1 establish a connection with the cell to upload and download da...

Embodiment 2

[0058] Figure 4 It is a flow chart of directly sending ICIC indication information to adjacent cells through physical layer signaling according to Embodiment 2 of the present invention, as shown in Figure 4 As shown, the process specifically includes the following steps 401 to 403:

[0059] Step 401: When CSG cell 1 detects that some PRBs have relatively large uplink interference, it notifies neighboring cells to perform interference reduction processing.

[0060] Step 402: CSG cell 1 directly notifies neighboring cells that overload occurs on these PRBs through physical layer signaling (ie, sends ICIC indication information), which means that CSG cell 1 has experienced strong interference on these PRBs.

[0061] Step 403: After receiving the OI report (i.e., ICIC indication information), the adjacent CSG cell 4 will take self-interference reduction measures, that is, the CSG cell 4 checks whether the user UE8 at the edge of the cell uses the overloaded PRB on the CSG cell ...

Embodiment 3

[0064] Assume that the system broadcast message 13 is used to notify neighboring cells of the strong PRB interference of the cell. The system broadcast message 13 includes the cell ID and the interference information of each PRB of the cell (for example, overload indication related information).

[0065] Figure 5 It is a flow chart of sending ICIC indication information to adjacent cells through UE relay system broadcast messages according to Embodiment 3 of the present invention, as shown in Figure 5 As shown, the process specifically includes the following steps 501 to 505:

[0066] Step 501: When CSG cell 1 detects relatively large uplink interference of some PRBs, it needs to notify neighboring cells to perform interference reduction processing.

[0067] Step 502: CSG cell 1 notifies UEs of adjacent cells that overload occurs on these PRBs through a broadcast system broadcast message 13, which means that CSG cell 1 has experienced strong interference on these PRBs.

[...

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Abstract

The invention discloses a method and a system for transmitting intercell interference coordination indication information. The method includes the step that a cell transmits ICIC indication information to neighboring cells via an air interface, wherein the ICIC indication information is used for carrying out an ICIC algorithm function. The invention solves the problem that the ICIC indication information cannot be transmitted because X2 interfaces do not exist between femtocells and between femtocells and macro base stations, and thereby femtocells can transmit the ICIC indication information.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a method and device for sending indication information of inter-cell interference coordination (Inter Cell Interference Coordination, ICIC for short). Background technique [0002] At present, the physical layer of the Long-Term Evolution (referred to as LTE) system adopts Orthogonal Frequency Division Multiplexing (referred to as OFDM) technology, and OFDM technology solves the problem of interference in the cell (sector) Time has certain advantages over Code Division Multiple Access (CDMA for short) technology. However, the inter-cell interference problem brought about by the OFDM system may be more severe than that of the CDMA system, especially when adjacent cells are of the same frequency. The idea of ​​the ICIC technology is to coordinate physical resource allocation between adjacent cells to avoid or reduce Inter-Cell Interference (ICI). [0003] Specifically, for the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/06H04W48/08H04W48/10H04W72/04
Inventor 汪孙节薛妍
Owner ZTE CORP