Adjustment method for almost blank subframe (ABS) pattern in heterogeneous network

An adjustment method and technology of heterogeneous networks, applied in the direction of network traffic/resource management, electrical components, wireless communication, etc., can solve problems such as the increase of empty subframes

Active Publication Date: 2013-03-20
POTEVIO INFORMATION TECH
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Problems solved by technology

When empty subframes are in a high-load state and need to feed back their DL ABS status and active UEs to add more empty subframes, if these UEs are counted, the time it takes to pass through the micro cell expansion area may be shorter than the control message Feedback latency plus configuration cycle latency for empty subframes, thus resulting in an unnecessary increase in empty subframes

Method used

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  • Adjustment method for almost blank subframe (ABS) pattern in heterogeneous network
  • Adjustment method for almost blank subframe (ABS) pattern in heterogeneous network
  • Adjustment method for almost blank subframe (ABS) pattern in heterogeneous network

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Embodiment approach

[0068] The UE receives the reference signal from the macro base station and the reference signal from the micro base station, and obtains the RSRP from the macro base station and the RSRP from the micro base station;

[0069] The UE feeds back the RSRP from the macro base station and the RSRP from the micro base station to the micro base station;

[0070] The micro base station calculates the difference between the RSRP from the macro base station and the RSRP from the micro base station fed back by the UE, and judges whether the difference is greater than the first threshold value. If yes, the UE is a high-interference UE; otherwise, the UE is a low-interference UE.

[0071] In the embodiment of the present invention, the mobile state of the UE is divided into normal speed, medium speed and high speed mobile state. The determination of the mobility status of the UE by the eNB may be determined by the eNB itself, or may be determined by the eNB according to the mobility statu...

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Abstract

The present invention provides an adjustment method for an almost blank subframe (ABS) pattern in a heterogeneous network. The method comprises the following steps: A, based on reference signal receiving power RSRP information fed back by user equipment UE, a micro base station identifies the UE as a high interference user or a low interference user; B, the micro base station counts DL ABS status or an active UE number according to the number of high interference users; C, the micro base station feeds the counted DL ABS status or the active UE number back to a macro base staion; D, the macro base station combines the feedback from each micro base station to determine whether to adjust the ABS pattern, and if so, a new ABS pattern or ABS pattern adjustment information is sent via the X2 interface between the macro base station and the micro base station.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a heterogeneous network, and in particular to a method for adjusting an ABS mode in a heterogeneous network. Background technique [0002] The topic of heterogeneous network was introduced on the recent 3gpp plenary session. A heterogeneous network refers to the deployment of many micro cells under a macro cell, such as remote radio head (RRH, Remote Radio Head), pico eNB, HeNB, and relay node. The introduction of these micro cells leads to more cell border areas, which cause severe interference. In addition, the power imbalance between the macro cell and the micro cell further aggravates this interference. There are typically two types of deployments under a heterogeneous network. One is macro cell+femto cell, and the other is macro cell+pico cell. In both deployments, there are serious interference problems. [0003] The interference under the macro cell+pico ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/18
Inventor 张莉莉李婷吴联海张欢潘瑜高兴航
Owner POTEVIO INFORMATION TECH
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