Method and arrangement for inter-cell interference coordination

A technology of inter-cell interference and adjacent cells, applied in distributed allocation, space transmit diversity, network planning, etc., can solve problems such as small net gain, reduced overall system capacity, and reduced macro cell capacity

Active Publication Date: 2016-11-02
TELEFON AB LM ERICSSON (PUBL)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, the consequence of imposing ICIC schemes such as ABS / RPSF is that the capacity of cooperating macrocells is reduced
Some investigations have shown that the net gain of introducing ABS / RPSF may be very small, or in some cases it actually reduces the overall system capacity

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  • Method and arrangement for inter-cell interference coordination
  • Method and arrangement for inter-cell interference coordination

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Embodiment Construction

[0021] In this description, LTE technical terms will be mainly used when explaining the principles of the solutions presented herein. However, this solution is also applicable to wireless communication systems operating according to other standards applying multi-antenna transmission and precoding / beamforming.

[0022] Some examples herein will be described in a heterogeneous network scenario, where interference is caused by high power nodes (eg denoted "macro" nodes / cells) to low power nodes LPN (eg denoted "pico" nodes / cells). High power nodes may also be referred to as "aggressor" nodes, and LPNs may also be referred to as "victim" nodes. However, this solution is also applicable in the case of neighboring nodes with other power relationships (eg nodes of equal power). In the description, one of the nodes will also be indicated as BS1 and another BS2, where BS1 may be a high power node and BS2 may be an LPN, or BS1 and BS2 may have other power relationships.

[0023] In h...

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Abstract

Network node and method therein for inter cell interference coordination. A method in a network node comprises estimating (301, 402) spatial properties of a radio channel R1 between a base station BS1 and at least part of an underlay / neighboring cell based on information about spatial properties of a radio channel between the base station BS1 and a respective at least one UE, UEi, located in aregion associated with inter cell interferencein relation to the underlay / neighboring cell; and adapting (302, 405) a transmission to a UE, served by the base station BS1, in a reduced power subframe, based on a correlation between the spatial properties of the radio channel R1 and estimated spatial properties of a radio channel between the base station BS1 and the UE. Performing of the method enables control of interference subjected towards the underlay / neighboring cell, caused by downlink transmission to the UE.

Description

technical field [0001] The solutions described herein relate generally to inter-cell interference coordination ICIC, and specifically to ICIC in wireless communication systems applying multiple transmit antennas and precoding / beamforming. Background technique [0002] In order to meet higher capacity requirements and higher user experience, heterogeneous networks or heterogeneous networks are regarded as an important supplement to macro network densification. Heterogeneous networks can be characterized as deployments with a mix of macro and small cells with overlapping coverage areas. An example of such a deployment is the deployment of small so-called pico cells within the coverage area of ​​a larger macro cell to offload macro traffic and provide higher bit rates by reducing the distance between users and the serving base station. A pico base station is an example of a low power node LPN (compared to a high power node formation) that transmits with low output power, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04W16/32H04W52/24H04W72/04H04W72/08
CPCH04B7/0456H04B7/0617H04W52/146H04W52/243H04W52/244H04W52/38H04L5/0032H04W16/32
Inventor B.戈兰斯森T.安德列亚森
Owner TELEFON AB LM ERICSSON (PUBL)
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