Distribution of cell-common downlink signals in a hierarchical heterogeneous cell deployment

A physical downlink and signal technology, applied in the field of carrier resource allocation reference signal, can solve the problem of low resource utilization efficiency

Active Publication Date: 2013-10-23
TELEFON AB LM ERICSSON (PUBL)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] A disadvantage of operating layers on different carrier

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  • Distribution of cell-common downlink signals in a hierarchical heterogeneous cell deployment
  • Distribution of cell-common downlink signals in a hierarchical heterogeneous cell deployment
  • Distribution of cell-common downlink signals in a hierarchical heterogeneous cell deployment

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Embodiment Construction

[0043] Various embodiments of the invention are now described with reference to the drawings, wherein like 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 carried out 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.

[0044] Note that although terminology from the 3GPP specifications for LTE and LTE-Advanced is used throughout this document to exemplify the invention, this should not be viewed as limiting the scope of the invention to these systems only. Other wireless systems that include or are adapted to include heterogeneous cell deployments may also...

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Abstract

A high-power point (110) and one or more low-power points (120) transmit signals that are associated with the same cell-identifier in a heterogeneous cell deployment. The coverage areas corresponding to the low-power points (120) fall at least partly within the coverage area for the high-power point (110), so that mobile stations (130) within range of a low-power point are also within range of the high-power point (110), from a downlink perspective. The same CRS signals are transmitted by both the high-power (macro) point (110) and some or all of the low-power (pico) points (120). At the same time, the network transmits CRS-based PDSCH for a particular UE on both the high-power point (110) as well as on some or all of the low-power points (120). In some embodiments only a subset of the points, e.g., those points that the UE hears sufficiently well, participate in the PDSCH transmission using CRS for channel estimation.

Description

[0001] relevant application [0002] This application claims priority to US Provisional Application No. 61 / 440916, filed February 9, 2011, the entire contents of which are incorporated herein by reference. technical field [0003] The present invention relates generally to device control in wireless communication networks and more particularly to techniques for allocating reference signals to carrier resources in these networks. Background technique [0004] The 3rd Generation Partnership Project (3GPP) is continuing to develop a fourth generation wireless network technology known as Long Term Evolution. Improving support for heterogeneous network operation is part of the in-progress specification for 3GPP LTE Release 10, and more improvements are being discussed in the context of new features for Release 11. In a heterogeneous network, mixed cells of different sizes and overlapping coverage areas are deployed. [0005] exist figure 1 An example of such a deployment can...

Claims

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Application Information

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IPC IPC(8): H04L5/00
CPCH04L5/0048H04L25/03898H04L1/1812H04W88/06H04L27/2613Y02D30/70H04W72/23H04W16/32
Inventor G·乔恩格伦L·林德博姆S·帕克瓦尔
Owner TELEFON AB LM ERICSSON (PUBL)
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