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Interference coordination method, interference coordination system and network node

A network node and interference coordination technology, applied in the field of communication, can solve problems such as uplink/downlink cross-interference

Active Publication Date: 2014-09-10
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] The existing CCIM mechanism can avoid uplink / downlink cross-interference between Small Cells, but in a heterogeneous network, if MacroCell and Small Cell are on the same frequency or in adjacent bands, then if both are allowed to transmit at the same time, MacroCell may be generated. Uplink / downlink cross-interference with Small Cell and between Macro UE and Small Cell UE

Method used

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  • Interference coordination method, interference coordination system and network node
  • Interference coordination method, interference coordination system and network node
  • Interference coordination method, interference coordination system and network node

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0078] Assumption: Macro eNB and Small Cells within its coverage form a cell group, and Small Cells can be divided into several Small Cell clusters.

[0079] Embodiment steps are as follows:

[0080] Step 1: Determine the central management node and the restricted and unrestricted cells

[0081]Since the Macro eNB provides a wide range of coverage, the Macro eNB can be selected as the central management node.

[0082] Considering the interference situation, the Macro eNB may interfere with any cell within its coverage area, so the cells under the Macro eNB can be selected as restricted cells, and other Small Cells as unrestricted cells. In this case, the Macro eNB can know whether the Macro cell supports dynamic TDD configuration information and the indication information of whether dynamic TDD configuration needs to be enabled, so the embodiment only introduces the interaction between the Macro eNB and the Small Cell (or Small Cell Cluster) .

[0083] Step 2: The central m...

Embodiment 2

[0105] Embodiment 2 is assumed to be the same as Embodiment 1. The main difference is that in Embodiment 1, the central management node notifies the restricted cell and the unrestricted cell, and the restricted cell notifies the UE it serves is the minimum common TDD UL / DL configuration. set, while the embodiment 2 notifies the subframe set outside the minimum common set of TDD UL / DL configuration.

[0106] Embodiment 2 except step five, six, seven, other steps are all the same as embodiment 1, only introduce different steps here:

[0107] 1) The difference between Step 5 and Example 1 is:

[0108] In Step 5 of Embodiment 1, the Macro eNB notifies the Small Cell (or Small Cell Cluster) and the UE of the minimum common set of TDD UL / DL configurations, while in Embodiment 2 it notifies the minimum common set of TDD UL / DL configurations Other subframes, that is, assuming that the minimum common set of TDD UL / DL configuration determined by Macro eNB is subframe {0,1,2,5}, then th...

Embodiment 3

[0116] Embodiment 3 is assumed to be the same as Embodiment 1. The main difference between Embodiment 3 and Embodiment 1 is that the central management node notifies the unrestricted cell / cell cluster of the TDD UL / Cell specifically used by the cell / cell cluster. DL configuration. The difference between this embodiment 3 and embodiment 1 mainly lies in steps five and six, and other steps are identical.

[0117] In Step 5 of Embodiment 1, what the Macro eNB indicates to the Small Cell (or Small Cell Cluster) is the minimum common set of TDD UL / DL configurations, and here, what the Macro eNB indicates to the Small Cell (or Small Cell Cluster) is the Small Cell ( or Small Cell Cluster) specific TDD UL / DL configurations that can be used.

[0118] For this embodiment 3, step 6 in embodiment 1 can be omitted.

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Abstract

Disclosed are an interference coordination method and system, and a network node, so as to avoid the cross interference of uplink and downlink. The method comprises: a first network node determining a minimum common set configured by a TDD UL / DL, a restricted cell and an unrestricted cell, and notifying the restricted cell controlled by a second network node and the unrestricted cell controlled by a third network node of the related information about the minimum common set, wherein the transmission direction of a subframe in the minimum common set remains unchanged, the restricted cell only permits using the subframe in the minimum common set to perform data transmission, and the unrestricted cell permits using all the subframes to perform data transmission; the second network node receiving the related information about the minimum common set notified by the first network node and controlling the restricted cell to only permit using the subframe in the minimum common set to perform data transmission according to the related information about the minimum common set; and the third network node receiving the related information about the minimum common set notified by the first network node and controlling the unrestricted cell to permit using all the subframes to perform data transmission according to the related information about the minimum common set.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an interference coordination method, system and a network node. Background technique [0002] As one of the two basic duplex systems, Time Division Duplex (TDD) mode has received more and more attention under the background of increasing demand for bandwidth in broadband mobile communications. In the TDD system, uplink and downlink transmission use the same frequency resources, and uplink / downlink data transmission is performed through time division multiplexing. In common TDD systems, including 3G TD-SCDMA system and 4G TD-LTE system, the division of uplink and downlink is static or semi-static, and the usual practice is to base the cell type and approximate business in the network planning process. The ratio determines the uplink and downlink ratio and keeps it constant, which is a relatively simple and effective method in the context of large coverage of the ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/10H04W16/14H04W72/00
CPCH04W72/04H04W72/541
Inventor 赵亚利许芳丽
Owner DATANG MOBILE COMM EQUIP CO LTD
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