Almost-blank subframe configuration detection in heterogeneous networks

A heterogeneous network and macro cell technology, applied in the field of heterogeneous wireless communication networks, can solve the problem of reducing the peak-to-average power ratio

Inactive Publication Date: 2014-09-17
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although similar in many respects to conventional OFDMA techniques, SC-FDMA signals offer a reduced peak-to-average power ratio (PAPR) compared to OFDMA signals, thus allowing the transmitter power amplifier to be operated more efficiently

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  • Almost-blank subframe configuration detection in heterogeneous networks
  • Almost-blank subframe configuration detection in heterogeneous networks
  • Almost-blank subframe configuration detection in heterogeneous networks

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Embodiment Construction

[0034] Various embodiments of the present invention are now described with reference to the drawings, wherein like reference numerals are used to refer to like elements throughout. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It will be apparent, however, to one skilled in the art that some embodiments of the invention may be practiced or practiced without one or more of these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing the embodiments.

[0035] Note that although terminology from 3GPP's specifications for LTE and LTE-Advanced (see e.g. 3GPP TS 36.211 v10.3.0) is used throughout this document to illustrate the invention, this should not be seen as limiting the scope of the invention to only limited to these systems. Other wireless systems that include, or ar...

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Abstract

A method for detecting an Almost-Blank Subframe (ABS) configuration for an interfering macro cell of a heterogeneous network is implemented in a wireless terminal. For one or more resource blocks in a received signal, a first power metric is calculated as a function of channel response estimates determined for predicted cell-specific (or common) reference signal (CRS) resource element locations in a plurality of symbols. For the one or more resource blocks in the received signal, a second power metric is calculated as a function of channel response estimates determined for the predicted CRS resource element locations in a single one of the plurality of symbols. A difference between the first and second power metrics is compared to a threshold, and responsive to the comparison a determination is made as to whether the macro cell is operating in a Multicast and Broadcast Single Frequency Network (MBSFN) mode or a non-MBSFN mode.

Description

technical field [0001] The present invention relates generally to heterogeneous wireless communication networks and, more particularly, to techniques for determining an almost blank subframe (ABS) configuration for a macrocell in a heterogeneous network. Background technique [0002] The 3rd Generation Partnership Project (3GPP) is continuing to develop a fourth generation wireless network technology called Long Term Evolution (LTE). In a heterogeneous network, a mix of cells of different sizes and overlapping coverage areas are deployed. Improved support for heterogeneous network operation is part of the ongoing specification of 3GPP LTE Release-10 and discusses improved support and other improvements in the context of new features for heterogeneous network operation for Release-11 and above. [0003] An example of such a deployment is at figure 1 As seen in a heterogeneous network 100 of , where several low power cells 120 (eg, pico cells) each having a corresponding cov...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04
CPCH04W48/16H04W84/045H04J11/005H04L5/005H04L27/2602H04W24/08H04L5/0023H04L5/0035H04L27/2656H04L27/2666H04B7/022H04B7/0413H04B17/318H04L25/022H04L25/0224H04B7/04H04W52/00H04W72/00
Inventor 汪剑锋M.卡穆夫李韶华F.诺德斯特罗姆
Owner TELEFON AB LM ERICSSON (PUBL)
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