Antenna configuration for co-operative beamforming

A technology of beamforming and antenna array, applied in the field of precoding codebook

Active Publication Date: 2012-09-05
KONINKLJIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is a need to specify how the codebook should be defined for these cases so that the signaling can be simple but still efficient

Method used

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  • Antenna configuration for co-operative beamforming
  • Antenna configuration for co-operative beamforming
  • Antenna configuration for co-operative beamforming

Examples

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no. 2 example

[0034] The second embodiment has the following advantages:

[0035] - Different data can be transmitted from different cells, which avoids the need to provide multiple copies of the same data in several cells.

[0036] - Existing codebooks can be used without the need to indicate any phase offset.

[0037] - Scheduling decisions (eg transmission rate and power allocation) may be at least partially independent on different cells. This is the second embodiment can be more suitable for figure 2 The reason for the network shown.

[0038] As an additional feature of the second embodiment, the signaling indicating downlink transmission of multiple streams from multiple cells to the user equipment may be similar to the signaling for multiple streams from a single cell (i.e. PDCCH in LTE ). In general, there is a need to give the user equipment an indication of which is the appropriate reference signal to receive a given stream. If the reference is provided by means of precoded ...

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Abstract

The present invention relates to a method for communicating in a network, the network comprising at least a first cell and a second cell including respectively a first primary station having a first antenna array dedicated to the first cell and a second primary station having a second antenna array dedicated to the second cell, for communicating with a plurality of secondary stations, the method comprising the step of (a) providing with a co-operative beamforming transmission from the first and second primary stations to at least one first secondary station, wherein step (a) includes (al) the first secondary station signaling at least one channel matrix to at least one of the first and second primary stations, and (a2) the first and second primary stations applying a precoding matrix across both the first antenna array and the second antenna array, and wherein the precoding matrix comprises a first vector for the first cell and a second vector for the second cell, the precoding matrix being based on the at least one channel matrix.

Description

technical field [0001] The present invention relates to a method of communicating in a communication system such as a mobile communication system such as UMTS, LTE or LTE-Advanced. [0002] More particularly, the present invention relates to a method of communicating using cooperative beamforming, in which beamforming is acquired by utilizing master station antennas from different cells, and in which a precoding codebook for cooperative beamforming between different cells is used. Background technique [0003] To achieve higher transmission rates, it has been proposed to use cooperative beamforming, where multiple antennas from different cells are used to create at least one spatial stream towards the user terminal. In combination with beamforming and MIMO techniques, precoding is applied to the antennas by applying complex coefficients to the antennas such that the gain and / or phase of the transmit antennas are changed. Nevertheless, it is crucial to signal the user termin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
CPCH04B7/024H04B7/0417H04B7/0486H04B7/0617H04B7/0626H04B7/063H04B7/0632H04B7/0634H04B7/0639H04B7/0669H04B7/0697H04L1/06H04B7/06H04B7/0456
Inventor T.J.莫尔斯利C.C.周
Owner KONINKLJIJKE PHILIPS NV
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