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Point-dependent resource symbol configuration in a wireless cell

A resource, wireless network technology, applied in the field of reference signals in the network, can solve problems such as reducing the peak-to-average power ratio

Active Publication Date: 2013-10-30
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Point-dependent resource symbol configuration in a wireless cell
  • Point-dependent resource symbol configuration in a wireless cell
  • Point-dependent resource symbol configuration in a wireless cell

Examples

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Embodiment Construction

[0043] Various embodiments of the 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.

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

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Abstract

A high-power point and one or more low-power points transmit signals associated with the same cell-identifier in a heterogeneous cell deployment. Coverage areas corresponding to the low-power points fall at least partly within the coverage area for the high-power point, so that mobile stations within range of a low-power point are also within range of the high-power point. Channel-state-information reference symbols, CSI-RS, are transmitted using different CSI-RS resources on different transmission points within the cell, while configuration of CSI- RS measurement resources is conducted on a UE-specific basis. The choice of measurement resources to be used is determined by the network, based on the properties of the channels from the transmission points to the UE. As the UE moves around within the cell, the network tracks the channel properties and reconfigures the CSI-RS resources measured by the UE, to correspond to the resource of the closest transmission point or points.

Description

[0001] related application [0002] This application claims priority to US Provisional Application 61 / 440923, filed February 9, 2011, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates generally to the control of devices in wireless communication networks, and more specifically to techniques for allocating and using reference signals in networks with heterogeneous cell deployments. Background technique [0004] The 3rd Generation Partnership Project (3GPP) is continuing to develop a fourth generation wireless network technology called Long Term Evolution (LTE). Improved support for heterogeneous network operation is an ongoing specification of 3GPP LTE Release 10, and other improvements are discussed in the context of the new features of Release 11. In a heterogeneous network, a mix of cells of different sizes and overlapping coverage areas are deployed. [0005] An example of such a deployment is at figure 1 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/10
CPCH04W16/32H04L5/00H04L5/0048H04W24/10H04L5/0057H04L25/0204Y02D30/70H04W72/54H04J11/00H04L5/0032H04W52/244H04W88/02
Inventor G.乔恩格伦L.林德博姆S.帕克瓦尔
Owner TELEFON AB LM ERICSSON (PUBL)