US 9,806,872 B2Granted

Apparatus and method for cancelling inter-cell interference in communication system

AssigneeInnovative Technology Lab Co., Ltd.

InventorJianjun Li

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Abstract

The present disclosure relates to an apparatus and method for canceling and/or suppressing inter-cell interference in a wireless communication. The method includes: establishing a Radio Resource Control (RRC) connection with a base station through a first serving cell; receiving, at a User Equipment (UE), an RRC message through the first serving cell, the RRC message comprising cell-specific reference signal (CRS) information of a neighbor cell and Physical Downlink Shared Channel (PDSCH) information of the neighbor cell, and the PDSCH information of the neighbor cell comprising a parameter relating to a power ratio of a CRS of the neighbor cell and a PDSCH of the neighbor cell; receiving the PDSCH through the first serving cell; performing a channel estimation for retrieving data from a PDSCH of the first serving cell; and retrieving the data from the PDSCH of the first serving cell based on the second channel estimation.

Claims20

Dependent claims

A User Equipment (UE) to perform a wireless communication in an inter-cell interference environment, the UE comprising:

a processor to establish a Radio Resource Control (RRC) connection with a base station through a first serving cell, and to perform a channel estimation for retrieving data from a Physical Downlink Shared Channel (PDSCH) of the first serving cell;
and
a receiver to receive an RRC message through the first serving cell, the RRC message comprising cell-specific reference signal (CRS) information of a neighbor cell and PDSCH information of the neighbor cell, and the PDSCH information of the neighbor cell comprising a parameter relating to a power ratio of a CRS of the neighbor cell and a PDSCH of the neighbor cell, and to receive the PDSCH through the first serving cell,
wherein the channel estimation comprises:
performing a first channel estimation for the PDSCH of the first serving cell based on a CRS of the first serving cell,
based on interference information of the CRS of the neighbor cell, canceling an interference of the CRS of the neighbor cell from the first channel estimation, and
based on the parameter relating to the power ratio of the CRS of the neighbor cell and the PDSCH of the neighbor cell, performing a second channel estimation for the PDSCH of the first serving cell by canceling an interference of the PDSCH of the neighbor cell;
and
wherein the processor retrieves the data from the PDSCH of the first serving cell based on the second channel estimation.

6 more elements

A base station to perform a wireless communication in an inter-cell interference environment, the base station comprising:

a processor to establish a Radio Resource Control (RRC) connection with a User Equipment (UE) through a first serving cell;
and
a transmitter to transmit, to the UE, an RRC message through the first serving cell, the RRC message comprising cell-specific reference signal (CRS) information of a neighbor cell and Physical Downlink Shared Channel (PDSCH) information of the neighbor cell, and the PDSCH information of the neighbor cell comprising a parameter relating to a power ratio of a CRS of the neighbor cell and a PDSCH of the neighbor cell, and to transmit the PDSCH through the first serving cell,
wherein the parameter relating to the power ratio of the CRS of the neighbor cell and the PDSCH of the neighbor cell is configured for the UE to cancel an interference of the PDSCH of the neighbor cell in retrieving data from the PDSCH of the first serving cell,
wherein the RRC message further comprises interference information of an enhanced Physical Downlink Control Channel (ePDCCH) of the neighbor cell, and
wherein the interference information of the ePDCCH of the neighbor cell comprises an ePDCCH region of the neighbor cell, a parameter relating to a power ratio of the CRS of the neighbor cell and the ePDCCH of the neighbor cell, and probability information of quadrature phase shift keying (QPSK) used for the ePDCCH.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/405,211Filed 12 Jan 2017 · continuation
Priority: KR 10-2013-01321091 Nov 2013
Published: US 2017/0126388 A14 May 2017
Granted: 31 Oct 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

H04L 5/0073
Allocation criteria: allocation arrangements that take into account other cell interferences
H04B 7/0854
Joint weighting: using error minimizing algorithms, e.g. minimum mean squared error [MMSE], "cross-correlation" or matrix inversion
H04L 5/0035
Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation: resource allocation in a cooperative…
H04L 5/0048
Arrangements for allocating sub-channels of the transmission path: allocation of pilot signals, i.e. of signals known to the receiver

Family

Application14/530,501Parent of this continuation · filed 31 Oct 2014
US 2017/0126388 A1Pre-grant publication · published 4 May 2017
US 9,584,293 B2Parent of this continuation
US 2015/0124691 A1Published application
US 9,806,872 B2This patent

From the US filing history. Foreign family members aren’t listed.