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Carrier aggregation-based inter-femtocell distributed interference coordination method

A home base station and carrier aggregation technology, applied in network planning, digital transmission system, electrical components, etc., can solve low interference and other problems

Active Publication Date: 2012-08-15
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The present invention aims at the defects of the existing home base station interference coordination method, and aims to provide a distributed interference coordination method between home base stations based on carrier aggregation, and provide an effective interference management method between home base stations, which can achieve higher frequency spectrum utilization low interference

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  • Carrier aggregation-based inter-femtocell distributed interference coordination method

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Embodiment Construction

[0024] The basic idea of ​​the present invention is that the home base station first determines the component carriers used for carrier aggregation in the current network, and initializes all of them; then calculates the signal interference on each component carrier used by it according to the measured reference signal power Noise ratio, building a local component carrier blocking tree; finally, according to the interference situation of each component carrier, calculate its release probability, and the home base station chooses whether to release the component carrier according to the probability. When a new HNB joins, the above steps are also used to configure the component carrier. The present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] like figure 1 Shown is a flow chart of a method for coordinating distributed interference among home base stations based on carrier aggregation in an embodiment of the present inventio...

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Abstract

The invention discloses a carrier aggregation-based inter-femtocell distributed interference coordination method. The method comprises the following steps of: determining all component carriers participating in carrier aggregation in a wireless communication network through the femtocell; initializing component carriers of each femtocell by employing a method for initializing all the component carriers; calculating a signal interference noise ratio on each component carrier occupied by each femtocell according to received power of a reference signal, and establishing a local component carrier blocking tree; calculating a release probability of each component carrier according to the local component carrier blocking tree; releasing the component carriers through the femtocell according to the release probability, and reconfiguring the component carriers. The interference difference conditions among different component carriers in the same femtocell are considered and are reflected in the established local component carrier blocking tree, the component carriers are reconfigured by combining the interference dimension and interference strength information of the interference stressed by component carrier, and a novel direction is provided for inter-femtocell interference coordination.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method for coordinating distributed interference among home base stations based on carrier aggregation. Background technique [0002] At present, more than 50% of voice calls and more than 70% of data traffic are initiated indoors. However, due to the high loss of wireless signals passing through building walls, indoor coverage has always been problematic. Femtocells are proposed as small-scale indoor user access points, which can be used to enhance indoor coverage by users who join them autonomously, and thus receive widespread attention. However, the massive deployment of femtocells will inevitably lead to overlapping coverage of base stations and complicating interference. How to effectively manage interference has become one of the key issues in the research of femtocells. In order to maintain compatibility with previous versions, 3GPP LTE regards interference...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/14H04W72/04H04L5/00
Inventor 武穆清张钦娟徐春秀郑倩倩万俊杰
Owner BEIJING UNIV OF POSTS & TELECOMM
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